Fine tuning ⛭ before printing:

cad/CyanBusTransceiver/PCBSocket.scad

@@ -2,8 +2,8 @@
 $fs = 0.35;
 $fa = 0.50;
 
-$str  = 3;         // base strength
-$str1 = $str - 1;  // strength for the smaller sides
+$str  = 3.0;       // base strength
+$str1 = 2.5;       // strength for the smaller sides
 
 $eps  = 0.01;      // epsilon
 
@@ -15,7 +15,7 @@ pcb_str   =  1.6;
 pcb_z_off = 12.0;  // height of transceiver pcb above ground
 
 
-M2_outer  =  5.5;  // outer diameter for the M2 screw receptacles
+M2_outer  =  6.5;  // outer diameter for the M2 screw receptacles
 
 
 // s = socket
@@ -80,14 +80,14 @@ module PCBSocket() {
       pll2 = ph_led_l + 2*$str;
       translate([0, $str/2, 0])
         ph_led_placement()
-          translate([-pll2/2, -ph_w, 0])
-            square([pll2, ph_w]);
+          translate([-pll2/2, -ph_w -0.2, 0])
+            square([pll2, ph_w +0.2]);
 
       p4l2 = ph_485_l + 2*$str;
       translate([0, -$str/2, 0])
         ph_485_placement()
-          translate([-p4l2/2, 0, 0])
-            square([p4l2, ph_w]);
+          translate([-p4l2/2, 0.2, 0])
+            square([p4l2, ph_w +0.2]);
       
       screwPlacement() circle(d=M2_outer);
     }