diff --git a/src/key.scad b/src/key.scad
index bdb31cf..ed2eaf2 100644
--- a/src/key.scad
+++ b/src/key.scad
@@ -179,11 +179,13 @@ module inside() {
 }
 
 // put something at the top of the key, with no adjustments for dishing
-module top_placement(depth_difference) {
+module top_placement(depth_difference=0) {
   top_tilt_by_height = -$top_tilt / $key_height;
   top_tilt_y_by_length = $double_sculpted ? (-$top_tilt_y / $key_length) : 0;
 
-  translate([$top_skew_x + $dish_skew_x, $top_skew + $dish_skew_y, $total_depth - depth_difference]){
+  minkowski_height = $rounded_key ? $minkowski_radius : 0;
+
+  translate([$top_skew_x + $dish_skew_x, $top_skew + $dish_skew_y, $total_depth - depth_difference + minkowski_height/2]){
     rotate([top_tilt_by_height, top_tilt_y_by_length,0]){
       children();
     }
diff --git a/src/key_profiles/g20.scad b/src/key_profiles/g20.scad
index 66c5ed3..27e7d69 100644
--- a/src/key_profiles/g20.scad
+++ b/src/key_profiles/g20.scad
@@ -16,8 +16,10 @@ module g20_row(row=3, column = 0) {
   //also,
   $rounded_key = true;
 
-  $top_tilt_y = column * 3 * $double_sculpt_modifier;
-  $total_depth = 6 + abs((row-3) * 0.5);
+  $top_tilt_y = side_tilt(column);
+  extra_height = extra_side_tilt_height(column);
+
+  $total_depth = 6 + abs((row-3) * 0.5) + extra_height;
 
   if (row == 5 || row == 0) {
 
diff --git a/src/key_transformations.scad b/src/key_transformations.scad
index fb8b126..10ab530 100644
--- a/src/key_transformations.scad
+++ b/src/key_transformations.scad
@@ -131,3 +131,12 @@ module bump(depth=undef) {
     $key_bump_depth = depth == undef ? $key_bump_depth : depth;
     children();
 }
+
+// kinda dirty, but it works
+// might not work great with fully sculpted profiles yet
+module upside_down() {
+  // $top_tilt*2 because top_placement rotates by top_tilt for us
+  top_placement() rotate([180+$top_tilt*2,0,0]) {
+    children();
+  }
+}