diff --git a/README.md b/README.md
index d9a7bf8..ebb2e60 100644
--- a/README.md
+++ b/README.md
@@ -334,17 +334,19 @@ glue:
         - ...
 ```
 
-...where an `<anchor>` is the same as it was for points:
+...where an `<anchor>` is (mostly) the same as it was for points:
 
 ```yaml
 ref: <point reference>
 shift: [x, y] # default = [0, 0]
 rotate: num # default = 0
+relative: boolean # default = true
 ```
 
 The section's `top` and `bottom` are both formatted the same, and describe the center line's top and bottom intersections, respectively.
 In a one-piece case, this means that we project a line from a left-side reference point (optionally rotated and translated), another from the right, and converge them to where they meet.
 Split designs can specify `right` as a single number to mean the x coordinate where the side should be "cut off".
+The `relative` flag means that the `shift` is interpreted in layout size units instead of mms (see below).
 
 This leads to a gluing middle patch that can be used to meld the left and right sides together, given by the counter-clockwise polygon:
 
@@ -374,9 +376,10 @@ Now we can configure what we want to "export" as outlines from this phase, given
         - `middle` means an "ideal" version of the glue (meaning that instead of the `outline.glue` we defined above, we get `both` - `left` - `right`, so the _exact_ middle piece we would have needed to glue everything together
         - `both` means both sides, held together by the glue
         - `glue` is just the raw glue shape we defined above under `outline.glue`
-    - `size: num | [num_x, num_y]` : the width/height of the rectangles to lay onto the points
+    - `size: num | [num_x, num_y]` : the width/height of the rectangles to lay onto the points. Note that the `relative` flag for the glue declaration above meant this size as the basis of the shift. So during a `keys` layout with a size of 18, for example, a relative shift of `[.5, .5]` actually means `[9, 9]` in mms.
     - `corner: num # default = 0)` : corner radius of the rectangles
     - `bevel: num # default = 0)` : corner bevel of the rectangles, can be combined with rounding
+    - `bound: boolean # default = true` : whether to use the binding declared previously
 - `rectangle` : an independent rectangle primitive. Parameters:
     - `ref: <point reference>` : what position and rotation to consider as the origin
     - `rotate: num` : extra rotation
@@ -395,7 +398,7 @@ Using these, we define exports as follows:
 ```yaml
 exports:
     my_name:
-        - operation: add | subtract | intersect # default = add
+        - operation: add | subtract | intersect | stack # default = add
           type: <one of the types>
           <type-specific params>
         - ...
diff --git a/src/assert.js b/src/assert.js
index b9d888d..cf064c6 100644
--- a/src/assert.js
+++ b/src/assert.js
@@ -1,3 +1,4 @@
+const m = require('makerjs')
 const Point = require('./point')
 
 const assert = exports.assert = (exp, msg) => {
@@ -57,9 +58,8 @@ exports.anchor = (raw, name, points={}, check_unexpected=true, default_point=new
         a = points[raw.ref].clone()
     }
     if (raw.shift !== undefined) {
-        const xyval = wh(raw.shift || [0, 0], name + '.shift')
-        a.x += xyval[0]
-        a.y += xyval[1]
+        let xyval = wh(raw.shift || [0, 0], name + '.shift')
+        a.shift(xyval, true)
     }
     if (raw.rotate !== undefined) {
         a.r += sane(raw.rotate || 0, name + '.rotate', 'number')
diff --git a/src/io.js b/src/io.js
index 5de648d..fa1c105 100644
--- a/src/io.js
+++ b/src/io.js
@@ -6,7 +6,9 @@ const u = require('./utils')
 
 exports.dump_model = (model, file='model', debug=false) => {
     const assembly = m.model.originate({
-        models: u.deepcopy(model),
+        models: {
+            export: u.deepcopy(model)
+        },
         units: 'mm'
     })
 
diff --git a/src/outline.js b/src/outline.js
index 2747545..f47fb36 100644
--- a/src/outline.js
+++ b/src/outline.js
@@ -4,27 +4,46 @@ const a = require('./assert')
 const Point = require('./point')
 
 const rectangle = (w, h, corner, bevel, name='') => {
-    const error = (dim, val) => `Rectangle for "${name}" isn't ${dim} enough for its corner and bevel (${val} - ${corner} - ${bevel} <= 0)!`
-    const cw = w - corner - bevel
+    const error = (dim, val) => `Rectangle for "${name}" isn't ${dim} enough for its corner and bevel (${val} - 2 * ${corner} - 2 * ${bevel} <= 0)!`
+    const mod = 2 * (corner + bevel)
+    const cw = w - mod
     a.assert(cw >= 0, error('wide', w))
-    ch = h - corner - bevel
+    const ch = h - mod
     a.assert(ch >= 0, error('tall', h))
 
-    let res = m.models.Rectangle(w, h)
-    res = m.model.outline(res, bevel, 2)
-    res = m.model.outline(res, corner, 0)
+    let res = new m.models.Rectangle(cw, ch)
+    if (bevel > 0) res = m.model.outline(res, bevel, 2)
+    if (corner > 0) res = m.model.outline(res, corner, 0)
     return m.model.moveRelative(res, [corner + bevel, corner + bevel])
 }
 
-const parse_glue = exports._parse_glue = (config = {}, points = {}) => {
+const relative_anchor = (decl, name, points={}, check_unexpected=true, default_point=new Point()) => {
+    decl.shift = a.wh(decl.shift || [0, 0], name + '.shift')
+    const relative = a.sane(decl.relative === undefined ? true : decl.relative, `${name}.relative`, 'boolean')
+    delete decl.relative
+    if (relative) {
+        return size => {
+            const copy = u.deepcopy(decl)
+            copy.shift = [copy.shift[0] * size[0], copy.shift[1] * size[1]]
+            return a.anchor(copy, name, points, check_unexpected, default_point)
+        }
+    }
+    return () => a.anchor(decl, name, points, check_unexpected, default_point)
+}
+
+const layout = exports._layout = (config = {}, points = {}) => {
+
+    // Glue config sanitization
 
     a.detect_unexpected(config, 'outline.glue', ['top', 'bottom', 'waypoints', 'extra'])
 
+    
+
     for (const y of ['top', 'bottom']) {
         a.detect_unexpected(config[y], `outline.glue.${y}`, ['left', 'right'])
-        config[y].left = a.anchor(config[y].left, `outline.glue.${y}.left`, points)
+        config[y].left = relative_anchor(config[y].left, `outline.glue.${y}.left`, points)
         if (a.type(config[y].right) != 'number') {
-            config[y].right = a.anchor(config[y].right, `outline.glue.${y}.right`, points)
+            config[y].right = relative_anchor(config[y].right, `outline.glue.${y}.right`, points)
         }
     }
 
@@ -42,11 +61,16 @@ const parse_glue = exports._parse_glue = (config = {}, points = {}) => {
 
     return (params, export_name, expected) => {
 
-        a.detect_unexpected(params, `${export_name}`, expected.concat(['side', 'size', 'corner', 'bevel']))
+        // Layout params sanitization
+
+        a.detect_unexpected(params, `${export_name}`, expected.concat(['side', 'size', 'corner', 'bevel', 'bound']))
         const side = a.in(params.side, `${export_name}.side`, ['left', 'right', 'middle', 'both', 'glue'])
         const size = a.wh(params.size, `${export_name}.size`)
         const corner = a.sane(params.corner || 0, `${export_name}.corner`, 'number')
         const bevel = a.sane(params.bevel || 0, `${export_name}.bevel`, 'number')
+        const bound = a.sane(params.bound === undefined ? true : params.bound, `${export_name}.bound`, 'boolean')
+
+        // Actual layout
 
         let left = {models: {}}
         let right = {models: {}}
@@ -56,25 +80,35 @@ const parse_glue = exports._parse_glue = (config = {}, points = {}) => {
                 let from_x = -size[0] / 2, to_x = size[0] / 2
                 let from_y = -size[1] / 2, to_y = size[1] / 2
 
-                let bind = a.trbl(p.meta.bind || 0, `${pname}.bind`)
-                // if it's a mirrored key, we swap the left and right bind values
-                if (p.meta.mirrored) {
-                    bind = [bind[0], bind[3], bind[2], bind[1]]
-                }
-
-                from_x -= bind[3]
-                to_x += bind[1]
-
-                from_y -= bind[2]
-                to_y += bind[0]
-
+                // the original position
                 let rect = rectangle(to_x - from_x, to_y - from_y, corner, bevel, `${export_name}.size`)
-                rect = m.model.move(rect, [from_x, from_y])
+                rect = m.model.moveRelative(rect, [from_x, from_y])
+
+                // extra binding "material", if necessary
+                if (bound) {
+                    let bind = a.trbl(p.meta.bind || 0, `${pname}.bind`)
+                    // if it's a mirrored key, we swap the left and right bind values
+                    if (p.meta.mirrored) {
+                        bind = [bind[0], bind[3], bind[2], bind[1]]
+                    }
+    
+                    const bt = to_y + Math.max(bind[0], 0)
+                    const br = to_x + Math.max(bind[1], 0)
+                    const bd = from_y - Math.max(bind[2], 0)
+                    const bl = from_x - Math.max(bind[3], 0)
+    
+                    if (bind[0] || bind[1]) rect = u.union(rect, u.rect(br, bt))
+                    if (bind[1] || bind[2]) rect = u.union(rect, u.rect(br, -bd, [0, bd]))
+                    if (bind[2] || bind[3]) rect = u.union(rect, u.rect(-bl, -bd, [bl, bd]))
+                    if (bind[3] || bind[0]) rect = u.union(rect, u.rect(-bl, bt, [bl, 0]))
+                }
+                
+                // positioning and unioning the resulting shape
                 rect = p.position(rect)
                 if (p.meta.mirrored) {
-                    right = m.model.combineUnion(right, rect)
+                    right = u.union(right, rect)
                 } else {
-                    left = m.model.combineUnion(left, rect)
+                    left = u.union(left, rect)
                 }
             }
         }
@@ -82,18 +116,19 @@ const parse_glue = exports._parse_glue = (config = {}, points = {}) => {
         if (side == 'right') return right
 
         let glue = {models: {}}
-        if (['middle', 'both', 'glue'].includes(side)) {
+        if (bound && ['middle', 'both', 'glue'].includes(side)) {
 
             const get_line = (anchor) => {
                 if (a.type(anchor) == 'number') {
                     return u.line([anchor, -1000], [anchor, 1000])
                 }
-    
-                let from = anchor.clone()
-                let to = anchor.add([anchor.meta.mirrored ? -1 : 1, 0])
-                to = to.rotate(anchor.r, anchor.p).p
 
-                return u.line(from, to)
+                // if it wasn't a number, then it's a function returning an achor
+                // have to feed it `size` first in case it's relative
+                const from = anchor(size).clone()
+                const to = from.clone().shift([from.meta.mirrored ? -1 : 1, 0])
+
+                return u.line(from.p, to.p)
             }
     
             const tll = get_line(config.top.left)
@@ -110,13 +145,13 @@ const parse_glue = exports._parse_glue = (config = {}, points = {}) => {
     
             const left_waypoints = []
             const right_waypoints = []
-    
+
             for (const w of config.waypoints) {
                 const percent = w.percent / 100
                 const center_x = tip[0] + percent * (bip[0] - tip[0])
                 const center_y = tip[1] + percent * (bip[1] - tip[1])
-                const left_x = center_x - (w.left || w.width / 2)
-                const right_x = center_x + (w.right || w.width / 2)
+                const left_x = center_x - w.width[0]
+                const right_x = center_x + w.width[1]
                 left_waypoints.push([left_x, center_y])
                 right_waypoints.unshift([right_x, center_y])
             }
@@ -133,24 +168,26 @@ const parse_glue = exports._parse_glue = (config = {}, points = {}) => {
                 .concat([blp, bip, brp])
                 .concat(right_waypoints)
             }
-    
+
             glue = u.poly(waypoints)
         }
         if (side == 'glue') return glue
 
-        let both = m.model.combineUnion(u.deepcopy(left), glue)
-        both = m.model.combineUnion(both, u.deepcopy(right))
-        if (side == 'both') return both
+        if (side == 'middle') {
+            let middle = u.subtract(glue, left)
+            middle = u.subtract(middle, right)
+            return middle
+        }
 
-        let middle = m.model.combineSubtraction(both, left)
-        middle = m.model.combineSubtraction(both, right)
-        return middle
+        let both = u.union(u.deepcopy(left), glue)
+        both = u.union(both, u.deepcopy(right))
+        return both
     }
 }
 
 exports.parse = (config = {}, points = {}) => {
     a.detect_unexpected(config, 'outline', ['glue', 'exports'])
-    const glue = parse_glue(config.glue, points)
+    const layout_fn = layout(config.glue, points)
 
     const outlines = {}
 
@@ -162,17 +199,18 @@ exports.parse = (config = {}, points = {}) => {
             const name = `outline.exports.${key}[${++index}]`
             const expected = ['type', 'operation']
             part.type = a.in(part.type, `${name}.type`, ['keys', 'rectangle', 'circle', 'polygon', 'ref'])
-            part.operation = a.in(part.operation || 'add', `${name}.operation`, ['add', 'subtract', 'intersect'])
+            part.operation = a.in(part.operation || 'add', `${name}.operation`, ['add', 'subtract', 'intersect', 'stack'])
 
-            let op = m.model.combineUnion
-            if (part.operation == 'subtract') op = m.model.combineSubtraction
-            else if (part.operation == 'intersect') op = m.model.combineIntersection
+            let op = u.union
+            if (part.operation == 'subtract') op = u.subtract
+            else if (part.operation == 'intersect') op = u.intersect
+            else if (part.operation == 'stack') op = u.stack
 
             let arg
             let anchor
             switch (part.type) {
                 case 'keys':
-                    arg = glue(part, name, expected)
+                    arg = layout_fn(part, name, expected)
                     break
                 case 'rectangle':
                     a.detect_unexpected(part, name, expected.concat(['ref', 'shift', 'rotate', 'size', 'corner', 'bevel']))
@@ -181,7 +219,6 @@ exports.parse = (config = {}, points = {}) => {
                     const corner = a.sane(part.corner || 0, `${name}.corner`, 'number')
                     const bevel = a.sane(part.bevel || 0, `${name}.bevel`, 'number')
                     arg = rectangle(size[0], size[1], corner, bevel, name)
-                    arg = m.model.move(arg, [-size[0]/2, -size[1]/2]) // center
                     arg = anchor.position(arg)
                     break
                 case 'circle':
@@ -198,14 +235,14 @@ exports.parse = (config = {}, points = {}) => {
                     let poly_index = 0
                     for (const poly_point of poly_points) {
                         const poly_name = `${name}.points[${++poly_index}]`
-                        const anchor = a.anchor(point, point_name, points, true, last_anchor)
+                        const anchor = a.anchor(poly_point, poly_name, points, true, last_anchor)
                         parsed_points.push(anchor.p)
                     }
                     arg = u.poly(parsed_points)
                     break
                 case 'ref':
                     a.assert(outlines[part.name], `Field "${name}.name" does not name an existing outline!`)
-                    arg = outlines[part.name]
+                    arg = u.deepcopy(outlines[part.name])
                     break
             }
 
diff --git a/src/point.js b/src/point.js
index 9df127a..41d2c85 100644
--- a/src/point.js
+++ b/src/point.js
@@ -24,14 +24,10 @@ module.exports = class Point {
         [this.x, this.y] = val
     }
 
-    add(a) {
-        const res = this.clone()
-        res.x += a[0]
-        res.y += a[1]
-        return res
-    }
-
-    shift(s) {
+    shift(s, relative=true) {
+        if (relative) {
+            s = m.point.rotate(s, this.r)
+        }
         this.x += s[0]
         this.y += s[1]
         return this
diff --git a/src/points.js b/src/points.js
index d454ad2..ff0b180 100644
--- a/src/points.js
+++ b/src/points.js
@@ -183,7 +183,7 @@ const render_zone = exports._render_zone = (zone_name, zone, anchor, global_key)
             push_rotation(
                 rotations,
                 col.rotate,
-                anchor.add(col.origin).p
+                anchor.clone().shift(col.origin, false).p
             )
         }
 
@@ -264,5 +264,5 @@ exports.position = (points, shape) => {
     for (const [pname, p] of Object.entries(points)) {
         shapes[pname] = p.position(u.deepcopy(shape))
     }
-    return {layout: {models: shapes}}
+    return {models: shapes}
 }
\ No newline at end of file
diff --git a/src/utils.js b/src/utils.js
index 513de21..6ffa26d 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -14,18 +14,13 @@ exports.circle = (p, r) => {
     return new m.paths.Circle(p, r)
 }
 
-exports.rect = (w, h, o=[0, 0], mirrored=false) => {
+exports.rect = (w, h, o=[0, 0]) => {
     const res = {
         top:    line([0, h], [w, h]),
         right:  line([w, h], [w, 0]),
         bottom: line([w, 0], [0, 0]),
         left:   line([0, 0], [0, h])
     }
-    if (mirrored) {
-        for (const segment of Object.values(res)) {
-            [segment.origin, segment.end] = [segment.end, segment.origin] 
-        }
-    }
     return m.model.move({paths: res}, o)
 }
 
@@ -42,3 +37,31 @@ exports.poly = (arr) => {
     }
     return res
 }
+
+const farPoint = [1234.1234, 2143.56789]
+
+exports.union = (a, b) => {
+    return m.model.combine(a, b, false, true, false, true, {
+        farPoint
+    })
+}
+
+exports.subtract = (a, b) => {
+    return m.model.combine(a, b, false, true, true, false, {
+        farPoint
+    })
+}
+
+exports.intersect = (a, b) => {
+    return m.model.combine(a, b, true, false, true, false, {
+        farPoint
+    })
+}
+
+exports.stack = (a, b) => {
+    return {
+        models: {
+            a, b
+        }
+    }
+}
\ No newline at end of file
diff --git a/test/fixtures/absolem.yaml b/test/fixtures/absolem.yaml
index 147f8f5..c65e75d 100644
--- a/test/fixtures/absolem.yaml
+++ b/test/fixtures/absolem.yaml
@@ -43,6 +43,7 @@ points:
           stagger: -2
           rows:
             bottom:
+              bind: [,,10,]
             home:
               bind: [,,,10]
             top:
@@ -64,21 +65,18 @@ points:
           origin: [9.5, -9]
           rows:
             thumb:
-              bind: [,10]
+              bind: [10,1,,]
         home:
           spread: 21.25
           rotate: -28
           origin: [11.75, -9]
           rows:
             thumb:
-              bind: [,10,,10]
+              bind: [,10,,15]
         far:
           rows:
             thumb:
-              bind: [,,,10]
-      rows:
-        thumb:
-          bind: [10]
+              bind: [-1,,,5]
   key:
     bind: [0, 0, 0, 0]
   rotate: -20
@@ -105,12 +103,51 @@ outline:
         rotate: 90
     waypoints:
       - percent: 50
-        width: 100
-      - percent: 90
         width: 50
+      - percent: 90
+        width: 25
   exports:
-    basic:
+    outline:
       - type: keys
         side: both
         size: 18
-        corner: .5
\ No newline at end of file
+        corner: .5
+    holes:
+      - type: keys
+        operation: stack
+        side: both
+        size: 14
+        bound: false
+    middle:
+      - type: keys
+        operation: stack
+        side: middle
+        size: 24
+      - type: rectangle
+        size: [25, 5]
+        ref: home_thumb
+        shift: [0, 12]
+      - type: rectangle
+        size: [25, 5]
+        ref: far_thumb
+        shift: [-25, 12]
+      - type: rectangle
+        size: [25, 5]
+        ref: mirror_home_thumb
+        shift: [-25, 12]
+      - type: rectangle
+        size: [25, 5]
+        ref: mirror_far_thumb
+        shift: [0, 12]
+      - type: ref
+        name: outline
+        operation: intersect
+    complex:
+      - type: ref
+        name: outline
+      - type: ref
+        name: holes
+        operation: stack
+      - type: ref
+        name: middle
+        operation: stack
\ No newline at end of file