diff --git a/gallery/target_api.pdf b/gallery/target_api.pdf
index 5f2b55b..3b01552 100644
Binary files a/gallery/target_api.pdf and b/gallery/target_api.pdf differ
diff --git a/gallery/target_api.typ b/gallery/target_api.typ
index 7faa683..89e2283 100644
--- a/gallery/target_api.typ
+++ b/gallery/target_api.typ
@@ -113,8 +113,7 @@
     pos: (15, -3.5),
     size: (3, 1),
     id: "Extender",
-    fill: util.colors.green,
-    debug: (bounds: true, ports: true)
+    fill: util.colors.green
   )
   wire.wire(
     "Extender.north",
@@ -126,12 +125,12 @@
     bus: true
   )
 
-  /*
+  
   let mid = ("InstDataMgr.east", 50%, "RegFile.west")
   wire.wire(
     "InstDataMgr.Instr",
     (vertical: (), horizontal: mid),
-    id: "wInstDataMgr-Bus"
+    id: "wInstDataMgr-Bus",
     name: ("Instr", none),
     bus: true
   )
@@ -144,7 +143,7 @@
   wire.wire(
     "RegFile.A1",
     (horizontal: mid, vertical: ()),
-    id: "wBus-RegFile-A1"
+    id: "wBus-RegFile-A1",
     name: (none, "RS1"),
     slice: (19, 15),
     reverse: true,
@@ -153,7 +152,7 @@
   wire.wire(
     "RegFile.A3",
     (horizontal: mid, vertical: ()),
-    id: "wBus-RegFile-A3"
+    id: "wBus-RegFile-A3",
     name: (none, "RD"),
     slice: (11, 7),
     reverse: true,
@@ -162,12 +161,12 @@
   wire.wire(
     "Extender.in",
     (horizontal: mid, vertical: ()),
-    id: "wBus-Extender"
+    id: "wBus-Extender",
     slice: (31, 7),
     reverse: true,
     bus: true
   )
-
+  
   element.alu(
     pos: (
       22, (align: "in1", with: "RegFile.RD1")
@@ -179,11 +178,13 @@
   wire.wire(
     "RegFile.RD1",
     "ALU.in1",
-    id: "wRegFile-ALU"
+    id: "wRegFile-ALU",
     name: ("A", "SrcA"),
     bus: true
   )
+  wire.stub("ALU.north", side: "north")
 
+  /*
   element.block(
     pos: (
       26, (align: "in", with: "ALU.out")
diff --git a/src/elements/alu.typ b/src/elements/alu.typ
index 9a8cb82..c3af33b 100644
--- a/src/elements/alu.typ
+++ b/src/elements/alu.typ
@@ -1,45 +1,40 @@
 #import "@preview/cetz:0.3.2": draw
 #import "element.typ"
 #import "ports.typ": add-port
+#import "../util.typ"
+
+#let draw-shape(elmt, bounds) = {
+  let tl = bounds.tl
+  let tr = bounds.tr
+  let bl = bounds.bl
+  let br = bounds.br
 
-#let draw-shape(id, tl, tr, br, bl, fill, stroke) = {
   let p0 = tl
-  let p1 = (tr, 10%, br)
-  let p2 = (tr, 90%, br)
+  let p1 = util.lerp(tr, 10%, br)
+  let p2 = util.lerp(tr, 90%, br)
   let p3 = bl
-  let p4 = (tl, 55%, bl)
-  let p5 = (tl, 50%, br)
-  let p6 = (tl, 45%, bl)
+  let p4 = util.lerp(tl, 55%, bl)
+  let p5 = util.lerp(tl, 50%, br)
+  let p6 = util.lerp(tl, 45%, bl)
+
+  let bounds2 = element.complete-bounds(elmt, (
+    tl: p0,
+    tr: p1,
+    br: p2,
+    bl: p3
+  ))
   
-  let f1 = draw.group(name: id, {
-    
-    draw.merge-path(
-      inset: 0.5em,
-      fill: fill,
-      stroke: stroke,
-      close: true,
-      draw.line(p0, p1, p2, p3, p4, p5, p6)
-    )
-    draw.anchor("north", (p0, 50%, p1))
-    draw.anchor("south", (p2, 50%, p3))
-    draw.anchor("west", (p0, 50%, p3))
-    draw.anchor("east", (p1, 50%, p2))
-    draw.anchor("north-west", p0)
-    draw.anchor("north-east", p1)
-    draw.anchor("south-east", p2)
-    draw.anchor("south-west", p3)
-    draw.anchor("name", (p5, 50%, (p1, 50%, p2)))
-  })
-
-  let f2 = add-port(id, "west", (id: "in1"), (p0, 50%, p6))
-  let f3 = add-port(id, "west", (id: "in2"), (p3, 50%, p4))
-  let f4 = add-port(id, "east", (id: "out"), (p1, 50%, p2))
-
   let f = {
-    f1; f2; f3; f4
+    draw.line(
+      p0, p1, p2, p3, p4, p5, p6,
+      fill: elmt.fill,
+      stroke: elmt.stroke,
+      close: true
+    )
+    draw.anchor("name", (p5, 50%, (p1, 50%, p2)))
   }
 
-  return (f, tl, tr, br, bl)
+  return (f, bounds2)
 }
 
 /// Draws an ALU with two inputs
@@ -47,18 +42,7 @@
 /// #examples.alu
 /// For parameters description, see #doc-ref("element.elmt")
 #let alu(
-  x: none,
-  y: none,
-  w: none,
-  h: none,
-  name: none,
-  name-anchor: "center",
-  fill: none,
-  stroke: black + 1pt,
-  id: "",
-  debug: (
-    ports: false
-  )
+  ..args
 ) = {
   let ports = (
     west: (
@@ -70,24 +54,18 @@
     )
   )
   
-  element.elmt(
+  return element.elmt(
     draw-shape: draw-shape,
-    x: x,
-    y: y,
-    w: w,
-    h: h,
-    name: name,
-    name-anchor: name-anchor,
     ports: ports,
-    fill: fill,
-    stroke: stroke,
-    id: id,
-    auto-ports: false,
-    ports-y: (
-      in1: (h) => {h * 0.225},
-      in2: (h) => {h * 0.775},
-      out: (h) => {h * 0.5}
+    ports-pos: (
+      west: (
+        in1: l => l * 0.225,
+        in2: l => l * 0.775,
+      ),
+      east: (
+        out: l => l * 0.5
+      )
     ),
-    debug: debug
+    ..args
   )
 }
\ No newline at end of file
diff --git a/src/elements/element.typ b/src/elements/element.typ
index 2952461..5549ac1 100644
--- a/src/elements/element.typ
+++ b/src/elements/element.typ
@@ -10,7 +10,7 @@
       }
     }
   }
-  panic("Could not find port with id '" + str(id) + "'")
+  panic("Could not find port with id '" + str(id) + "' in ports " + repr(ports))
 }
 
 #let local-to-global(origin, u, v, points) = {
diff --git a/src/elements/ports.typ b/src/elements/ports.typ
index 52743c9..9f9ae74 100644
--- a/src/elements/ports.typ
+++ b/src/elements/ports.typ
@@ -142,7 +142,7 @@
       pt0.at(1) - pt1.at(1)
     }
     for (i, port) in side-ports.enumerate() {
-      let offset = get-port-pos(elmt, bounds, side, port, i)
+      let offset = get-port-pos(elmt, bounds, side, port.id, i)
 
       let pos = (pt0, offset, pt1)
       let offset-prev = if type(offset) == ratio {