speakers: updated design for better fit

reform2-speakers/reform2-speaker-mount.scad

+
+translate([0,20,0])
+union() {
+    difference() {
+        translate([-1,0,0]) cube([22,13.5,1]);
+        translate([1.5,1.75,-0.5]) cube([15,10,2]);
+    }
+
+    translate([-5.5,0,0]) 
+    union() {
+        difference() {
+            translate([0,0,-1]) cube([5,13.5,2]);
+            translate([2.5,4.25,0.5]) cylinder(h = 4, r1 = 1.5, r2 = 1, 
+                $fn = 20, center = true);
+            translate([2.5,9.5,0.5]) cylinder(h = 4, r1 = 1.5, r2 = 1, 
+                $fn = 20, center = true);
+        }
+    }
+    
+    translate([19,0,-1.5])
+    cube([2,13.5,1.5]);
+}

reform2-speakers/reform2-speaker-spacer.scad

+
+difference() {
+    cube([18.5,13.5,1]);
+    translate([1.75,1.75,-0.5]) cube([15,10,2]);
+}