Factor out common spoolmount components

lib/spoolmount.scad

@@ -0,0 +1,19 @@
+use <torus.scad>
+
+module spoolmount() {
+    // Ring
+    difference() {
+        cylinder(h=5, r=42, $fn=200);
+
+        translate([0, 0, -1])
+        cylinder(h=7, r=25, $fn=200);
+    }
+
+    // Rounded edges
+    translate([0, 0, 2.5]) {
+        torus(r_major=25, r_minor=2.5, xs=0.7, $fn=200);
+        torus(r_major=42, r_minor=2.5, xs=0.7, $fn=200);
+    }
+}
+
+spoolmount();

lib/spoolmount_a.scad

@@ -1,14 +1,8 @@
-use <torus.scad>
+use <spoolmount.scad>
 
 // SpoolMount fixed side (i.e. attached to printer or enclosure)
 module spoolmount_a() {
-    // Ring
+    spoolmount();
-    difference() {
-        cylinder(h=5, r=42, $fn=200);
-
-        translate([0, 0, -1])
-        cylinder(h=7, r=25, $fn=200);
-    }
 
     // Hooks
     for (x = [-33, 33]) {
@@ -43,15 +37,6 @@ module spoolmount_a() {
             [0, 0],
         ]);
     }
-
-    // Rounded edges
-    translate([0, 0, 2.5]) {
-        // Inside
-        torus(r_major=25, r_minor=2.5, xs=0.7, $fn=200);
-    
-        // Outside
-        torus(r_major=42, r_minor=2.5, xs=0.7, $fn=200); // 43.75
-    }
 }
 
 spoolmount_a();

lib/spoolmount_b.scad

@@ -1,13 +1,9 @@
-use <torus.scad>
+use <spoolmount.scad>
 
 // SpoolMount removable side (i.e. attached to spool holder or cage)
 module spoolmount_b() {
     difference() {
-        // Ring
+        spoolmount();
-        cylinder(h=5, r=42, $fn=200);
-
-        translate([0, 0, -1])
-        cylinder(h=7, r=25, $fn=200);
 
         // Holes
         for (a = [0 : 30 : 330]) {
@@ -28,12 +24,6 @@ module spoolmount_b() {
             }
         }
     }
-            
-    // Rounded edges
-    translate([0, 0, 2.5]) {
-        torus(r_major=25, r_minor=2.5, xs=0.7, $fn=200);
-        torus(r_major=42, r_minor=2.5, xs=0.7, $fn=200);
-    }
 }
 
 spoolmount_b();