diff --git a/examples/sa_ergo.scad b/examples/sa_ergo.scad
index 31f5d7b..6739405 100644
--- a/examples/sa_ergo.scad
+++ b/examples/sa_ergo.scad
@@ -1,27 +1,52 @@
 include <../includes.scad>
 
-$double_sculpted = true;
+/*
+In this example, we harness full sculpting and simple_layout to make a set of SA
+keys that look a lot like the key wells on a dactyl, dactyl manuform, or kinesis
 
+SA keys render faster with skin_extrude_shape = true, but then they don't get
+the nice flaring on the sides... yet.
+*/
+
+// to turn on full sculpting
+$double_sculpted = true;
+// to make the font fit
 $font_size = 4;
+
+// change this to make the full sculpting more or less aggressive. 200 is default
+$double_sculpt_radius = 200;
+
+// This is the exact column stagger from the dactyl transposed onto the
+// rows of the preonic default layout. the second array is for modifying the
+// values up or down - making all the 0's -1's would make each key 1mm lower
+// for instance.
 extra_column_height = [5.64, 5.64, 0, -3, 0, 0, 0, 0, 0, -3, 0, 5.64, 5.64] + [0,0,0,0,0,0,0,0,0,0,0,0,0];
+// required for double_sculpted_column
 row_length = len(preonic_default_layout[0]);
 
 simple_layout(preonic_default_layout) {
-  // uh oh, now I need two of them...
+  // this union is here because, for some reason, you cannot modify special variables
+  // that are modified in the scope directly above.
   union() {
+    // row declarations treat column 0 as perfectly center, so if we just used
+    // $column we'd have a ridiculously looking left-leaning keyboard.
+    // this function transforms the actual column value into a "2hands" column
+    // value, aka for a board with 2 "keywells", one for each hand
     column_value = double_sculpted_column($column, row_length, "2hands");
-    echo("column value", column_value);
+    /* echo("column value", column_value); */
     sa_row($row+1, column_value){
-      // this union is here because, for some reason, you cannot modify the
-      // variables dcs_row and other row decs modify in the scope below them.
+      // uh oh, now I need two of them...
       union() {
+        // uncomment when prototyping for faster prototypes!
         /* $dish_type = "disable"; */
         $stem_support_type = "disable";
+
+        // here's where the magic happens and we actually add the extra column height
         $total_depth = $total_depth + extra_column_height[$column];
-        /* key(); */
-        dished(){
-          legend(preonic_default_legends[$row][$column]) legends($inset_legend_depth);
-        }
+        key();
+
+        // this generates separate legends for the keys
+        /* legend(preonic_default_legends[$row][$column]) legends($inset_legend_depth); */
       }
     }
   }