diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6857f25..0f6c2e0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,15 @@ CHANGELOG:
     * side-printed keycaps are first class! you can use the `sideways()` modifier to set up sideways keycaps that have flat sides to print on.
     * it's much easier to make quick artisans now that the inside of the keycap is differenced from any additive features placed on top
     * `$linear_extrude_shape` and `$skin_extrude_shape` retired in favor of `$hull_shape_type`
-    * still todo: add a magic scaling variable so you can scale the whole world up, see if that fixes degeneracy
-    * still todo: rejigger supports
-    * still todo: rejigger inner shape. maybe just always make it flat
+    * added regular_polygon shape and octagonal and hexagonal key profiles
+    * added beta kailh choc
+    * Finally got ISO Enter working correctly!
+    * STILL TODO:
+      * add a magic scaling variable so you can scale the whole world up, see if that fixes degeneracy
+      * Make flat stem support default
+      * make flat inner shape default
+      * new_key_structure changes doesn't take into account support stems properly; fix
+      * support repositioning to print on the back surface of the keycap
+      * implement regular polygon for skin extrusions
+      * switch to skin-shaped extrusions by default
+      * kailh choc has a non-square key unit; should I get that working for layouts etc? 
diff --git a/customizer.scad b/customizer.scad
index 34e9148..468de64 100644
--- a/customizer.scad
+++ b/customizer.scad
@@ -178,6 +178,9 @@ $inset_legend_depth = 0.2;
 // Dimensions of alps stem
 $alps_stem = [4.45, 2.25];
 
+// Dimensions of choc stem
+$choc_stem = [1.2, 3];
+
 // Enable stabilizer stems, to hold onto your cherry or costar stabilizers
 $stabilizer_type = "costar_stabilizer"; // [costar_stabilizer, cherry_stabilizer, disable]
 
@@ -858,6 +861,34 @@ module box_cherry(slop) {
   children();
 }
 
+module choc(slop = 0.05) {
+  echo("WARN:\n\n * choc support is experimental.\n * $stem_slop is overridden.\n * it is also recommended to print them upside down if you can\n\n");
+  $stem_throw = 3;
+  $stem_slop = slop;
+
+  $bottom_key_width = 18;
+  $bottom_key_height = 17;
+
+  $stem_type = "choc";
+  children();
+}
+
+// a hacky way to make "low profile" keycaps
+module low_profile() {
+  $width_difference = $width_difference / 1.5;
+  $height_difference = $height_difference / 1.5;
+  // helps tilted keycaps not have holes if worst comes to worst
+  $inner_shape_type = "dished";
+
+  $top_tilt = $top_tilt / 1.25;
+
+  $total_depth = ($total_depth / 2) < 7 ? 7 : $total_depth / 2;
+
+  // just to make sure
+  $stem_throw = 3;
+  children();
+}
+
 module flared_support() {
   $support_type = "flared";
   children();
@@ -2078,6 +2109,22 @@ module cherry_stabilizer_stem(depth, slop) {
     inside_cherry_stabilizer_cross(slop);
   }
 }
+separation = 5.7;
+
+positions = [
+  [separation/2, 0],
+  [-separation/2, 0],
+];
+
+module choc_stem(depth, slop){
+  for (position=positions) {
+    translate([position.x,position.y, depth/2]) single_choc_stem(depth, slop);
+  }
+}
+
+module single_choc_stem(depth, slop) {
+  cube([$choc_stem.x - slop, $choc_stem.y - slop, depth], center=true);
+}
 
 
 //whole stem, alps or cherry, trimmed to fit
@@ -2094,6 +2141,8 @@ module stem(stem_type, depth, slop){
       filled_stem();
     } else if (stem_type == "cherry_stabilizer") {
       cherry_stabilizer_stem(depth, slop);
+    } else if (stem_type == "choc") {
+      choc_stem(depth, slop);
     } else if (stem_type == "disable") {
       children();
     } else {
@@ -2322,6 +2371,18 @@ module brim_support(stem_type, stem_support_height, slop) {
 
       inside_cherry_cross(slop);
     }
+  } else if(stem_type == "choc") {
+    translate([-5.7/2,0,0]) linear_extrude(height=stem_support_height) {
+      offset(r=1){
+        square($choc_stem + [3,3], center=true);
+      }
+    }
+
+    translate([5.7/2,0,0]) linear_extrude(height=stem_support_height) {
+      offset(r=1){
+        square($choc_stem + [3,3], center=true);
+      }
+    }
   }
 }
 // a safe theoretical distance between two vertices such that they don't collapse. hard to use
@@ -2579,6 +2640,10 @@ module tines_support(stem_type, stem_support_height, slop) {
     }
   } else if (stem_type == "alps"){
     centered_tines(stem_support_height);
+  } else if (stem_type == "choc"){
+    if ($key_length < 2) translate([0,0,$stem_support_height / 2]) cube([total_key_width($wall_thickness)+$wall_thickness/4, 0.42, $stem_support_height], center = true);
+    /* translate([-5.7/2,0,$stem_support_height / 2]) cube([0.5, total_key_height($wall_thickness), $stem_support_height], center = true); */
+    /* translate([5.7/2,0,$stem_support_height / 2]) cube([0.5, total_key_height($wall_thickness), $stem_support_height], center = true); */
   }
 }
 
@@ -2932,6 +2997,14 @@ module flared(stem_type, loft, height) {
           square(outer_cherry_stabilizer_stem($stem_slop) - [2,2], center=true);
         }
       }
+    } else if (stem_type == "choc") {
+      // single support, just the stem
+      new_choc_scale = [scale_for_45(height, $choc_stem[0] + 5.7 - $stem_slop), scale_for_45(height, $choc_stem[1])];
+      translate([0,0,0]) linear_extrude(height=height, scale = new_choc_scale){
+        // TODO make a choc_stem() function so it can build in the slop
+        square([$choc_stem[0] + 5.7 - $stem_slop, $choc_stem[1] - $stem_slop], center=true);
+      }
+
     } else {
       // always render cherry if no stem type. this includes stem_type = false!
       // this avoids a bug where the keycap is rendered filled when not desired
@@ -4473,6 +4546,9 @@ $inset_legend_depth = 0.2;
 // Dimensions of alps stem
 $alps_stem = [4.45, 2.25];
 
+// Dimensions of choc stem
+$choc_stem = [1.2, 3];
+
 // Enable stabilizer stems, to hold onto your cherry or costar stabilizers
 $stabilizer_type = "costar_stabilizer"; // [costar_stabilizer, cherry_stabilizer, disable]
 
diff --git a/src/key_transformations.scad b/src/key_transformations.scad
index 9bce421..34c2eeb 100644
--- a/src/key_transformations.scad
+++ b/src/key_transformations.scad
@@ -109,6 +109,34 @@ module box_cherry(slop) {
   children();
 }
 
+module choc(slop = 0.05) {
+  echo("WARN:\n\n * choc support is experimental.\n * $stem_slop is overridden.\n * it is also recommended to print them upside down if you can\n\n");
+  $stem_throw = 3;
+  $stem_slop = slop;
+
+  $bottom_key_width = 18;
+  $bottom_key_height = 17;
+
+  $stem_type = "choc";
+  children();
+}
+
+// a hacky way to make "low profile" keycaps
+module low_profile() {
+  $width_difference = $width_difference / 1.5;
+  $height_difference = $height_difference / 1.5;
+  // helps tilted keycaps not have holes if worst comes to worst
+  $inner_shape_type = "dished";
+
+  $top_tilt = $top_tilt / 1.25;
+
+  $total_depth = ($total_depth / 2) < 7 ? 7 : $total_depth / 2;
+
+  // just to make sure
+  $stem_throw = 3;
+  children();
+}
+
 module flared_support() {
   $support_type = "flared";
   children();
diff --git a/src/settings.scad b/src/settings.scad
index 1ed877f..dc67900 100644
--- a/src/settings.scad
+++ b/src/settings.scad
@@ -163,6 +163,9 @@ $inset_legend_depth = 0.2;
 // Dimensions of alps stem
 $alps_stem = [4.45, 2.25];
 
+// Dimensions of choc stem
+$choc_stem = [1.2, 3];
+
 // Enable stabilizer stems, to hold onto your cherry or costar stabilizers
 $stabilizer_type = "costar_stabilizer"; // [costar_stabilizer, cherry_stabilizer, disable]
 
diff --git a/src/stem_supports/brim.scad b/src/stem_supports/brim.scad
index 97ae5dc..372fcf3 100644
--- a/src/stem_supports/brim.scad
+++ b/src/stem_supports/brim.scad
@@ -43,5 +43,17 @@ module brim_support(stem_type, stem_support_height, slop) {
 
       inside_cherry_cross(slop);
     }
+  } else if(stem_type == "choc") {
+    translate([-5.7/2,0,0]) linear_extrude(height=stem_support_height) {
+      offset(r=1){
+        square($choc_stem + [3,3], center=true);
+      }
+    }
+
+    translate([5.7/2,0,0]) linear_extrude(height=stem_support_height) {
+      offset(r=1){
+        square($choc_stem + [3,3], center=true);
+      }
+    }
   }
 }
diff --git a/src/stem_supports/tines.scad b/src/stem_supports/tines.scad
index 56ff739..4eb2d59 100644
--- a/src/stem_supports/tines.scad
+++ b/src/stem_supports/tines.scad
@@ -77,5 +77,9 @@ module tines_support(stem_type, stem_support_height, slop) {
     }
   } else if (stem_type == "alps"){
     centered_tines(stem_support_height);
+  } else if (stem_type == "choc"){
+    if ($key_length < 2) translate([0,0,$stem_support_height / 2]) cube([total_key_width($wall_thickness)+$wall_thickness/4, 0.42, $stem_support_height], center = true);
+    /* translate([-5.7/2,0,$stem_support_height / 2]) cube([0.5, total_key_height($wall_thickness), $stem_support_height], center = true); */
+    /* translate([5.7/2,0,$stem_support_height / 2]) cube([0.5, total_key_height($wall_thickness), $stem_support_height], center = true); */
   }
 }
diff --git a/src/stems.scad b/src/stems.scad
index c53ab91..473c10a 100644
--- a/src/stems.scad
+++ b/src/stems.scad
@@ -4,6 +4,7 @@ include <stems/box_cherry.scad>
 include <stems/alps.scad>
 include <stems/filled.scad>
 include <stems/cherry_stabilizer.scad>
+include <stems/choc.scad>
 
 
 //whole stem, alps or cherry, trimmed to fit
@@ -20,6 +21,8 @@ module stem(stem_type, depth, slop){
       filled_stem();
     } else if (stem_type == "cherry_stabilizer") {
       cherry_stabilizer_stem(depth, slop);
+    } else if (stem_type == "choc") {
+      choc_stem(depth, slop);
     } else if (stem_type == "disable") {
       children();
     } else {
diff --git a/src/stems/choc.scad b/src/stems/choc.scad
new file mode 100644
index 0000000..1cd5316
--- /dev/null
+++ b/src/stems/choc.scad
@@ -0,0 +1,16 @@
+separation = 5.7;
+
+positions = [
+  [separation/2, 0],
+  [-separation/2, 0],
+];
+
+module choc_stem(depth, slop){
+  for (position=positions) {
+    translate([position.x,position.y, depth/2]) single_choc_stem(depth, slop);
+  }
+}
+
+module single_choc_stem(depth, slop) {
+  cube([$choc_stem.x - slop, $choc_stem.y - slop, depth], center=true);
+}
diff --git a/src/supports/flared.scad b/src/supports/flared.scad
index 50dd5c5..85b8283 100644
--- a/src/supports/flared.scad
+++ b/src/supports/flared.scad
@@ -40,6 +40,14 @@ module flared(stem_type, loft, height) {
           square(outer_cherry_stabilizer_stem($stem_slop) - [2,2], center=true);
         }
       }
+    } else if (stem_type == "choc") {
+      // single support, just the stem
+      new_choc_scale = [scale_for_45(height, $choc_stem[0] + 5.7 - $stem_slop), scale_for_45(height, $choc_stem[1])];
+      translate([0,0,0]) linear_extrude(height=height, scale = new_choc_scale){
+        // TODO make a choc_stem() function so it can build in the slop
+        square([$choc_stem[0] + 5.7 - $stem_slop, $choc_stem[1] - $stem_slop], center=true);
+      }
+
     } else {
       // always render cherry if no stem type. this includes stem_type = false!
       // this avoids a bug where the keycap is rendered filled when not desired