tune mount_radius for the Octathingy to hold 8 wires with room to spare (could even be 3.5), fix size of extrusion used to indent the top of the mount

Octathingy_mount_pcb.scad

@@ -34,7 +34,7 @@ include <CCRMA_logo.scad>;
 ////
 //// overrides
 
-mount_radius = 5;
+mount_radius = 4.0;
 
 ////
 //// default model parameters
@@ -364,12 +364,11 @@ module octa_capsule_array_mount(angles) {
             }
         }
         // indentations at the top to open up the array a bit
-        echo (mount_radius_capsule);
         translate([0, 0, mount_top_height + mount_radius_capsule / 8]) {
             for (rot = [45, 135, -135, -45]) {
                 translate([0, 0, 0]) {
                     rotate([0, 90, rot]) {
-                        linear_extrude(height = mount_radius * 2.0) {
+                        linear_extrude(height = mount_radius_capsule) {
                             minkowski() {
                                 polygon(points = [[0, mount_radius_capsule * 0.35], [0, - mount_radius_capsule * 0.35], 
                                                   [mount_radius_capsule * 2 / 3, 0]]);