remove ring_arm_gap as it is a global, reorder some parameters for clarity

SpHEAR_common.scad

@@ -390,7 +390,6 @@ module shock_mount_external_ring(height, xradius, yradius, corner, gap, lip) {
         }
     }
     // connection to stand mount
-    ring_arm_gap = 20;
     intersection() {
         translate([ring_arm_gap, 0, 0]) {
             difference() {

TinySpHEAR_mount_pcb.scad

@@ -65,14 +65,15 @@ pcb_tfit = 0.15;
 pcb_low_exp = 12.0;
 pcb_hi_exp = 8.0;
 
-// lip fit for flares
-lip_fit = 0.15;
-
 // clearance from the bottom and top of pcb's to the start of the flare,
 // this adds space for the protuding molex pins on which we solder
 pcb_low_clear = 15.0;
 pcb_hi_clear = 15.0;
 
+// back and front clearance of pcb (components and leads)
+pcb_front = 13.25;
+pcb_back = 3.0;
+
 // depth of slot into which the printed circuit board fits
 pcb_slot_depth = 1.0;
 
@@ -82,6 +83,9 @@ cable_diam = 9.5;
 // lip that mounts flares into main body box
 mount_lip = 6.0;
 
+// lip fit for flares
+lip_fit = 0.15;
+
 // capsule array mount, height of flare and stalk
 flare_height = 50;
 stalk_height = 40;
@@ -89,10 +93,6 @@ stalk_height = 40;
 // wall thickness
 wall = 1.0;
 
-// back and front clearance of pcb (components and leads)
-pcb_front = 13.25;
-pcb_back = 3.0;
-
 // calculated minimum "radius" of microphone box
 box_radius = pcb_front + (pcb_thickness + pcb_tfit) + pcb_back + 2 * wall;