diff --git a/main.scad b/main.scad
index 7494406..cc13774 100644
--- a/main.scad
+++ b/main.scad
@@ -55,19 +55,20 @@ module phone_harness() {
     ps=[ops.x+0.2, ops.y+0.2, ops.z+0.2];
     shell_wall=3;
     shell_rim_wall=3;
-    rim_edge_thickness=1.2;
+    rim_edge_thickness=1.5;
     rim_edge_tolerance=0.4;
-    expose_back_camera=false;
+    expose_back_camera=true;
     screwmount_screw=3;
     harness_divider=[1, 0, 1.3];
     harness_size=[ps.x+shell_wall*2, ps.y+shell_wall*2, ps.z+shell_wall*2];
-    rim_size=[harness_size.x+2*shell_rim_wall, harness_size.y+2*shell_rim_wall, 6];
+    rim_size=[harness_size.x+2*shell_rim_wall, harness_size.y+2*shell_rim_wall, 8];
     
     w=shell_wall;
     f=2;
     rf=5;
     hs=harness_size;
-    backplane_rim_size=[30, ps.y*0.95, shell_wall/2];
+    backplane_rim_size=[40, ps.y*0.95, shell_wall/2];
+    backplane_teeth=6;
     
     // ==== SHELL ====
     
@@ -130,19 +131,23 @@ module phone_harness() {
         }
     }
     module shell_backplane(groove) {
-        down(hs.z/2 - shell_wall/6) up(backplane_rim_size.z/2) right(harness_divider.x) {
+        module groove_scale() { scale([groove?1.05:1, groove?1.05:1, groove?1.2:1]) children(); }
+        down(hs.z/2 - shell_wall/3) up(backplane_rim_size.z/2) right(harness_divider.x) {
             back(backplane_rim_size.y/2) {
-                teeth=4;
+                teeth=backplane_teeth;
                 segment=backplane_rim_size.y/teeth;
                 tooth_size=[backplane_rim_size.x, segment/2, backplane_rim_size.z];
+                joiner_base=5;
+                joiner_size=[joiner_base + (groove?backplane_pip_slideout:0), segment*1.5, backplane_rim_size.z];
                 for (i = [0:teeth-1]) {
-                    fwd(i*segment) fwd(tooth_size.y) scale(groove ? 1.02 : 1) cubi(tooth_size, fillet=2, edges=EDGES_Z_LF);
+                    fwd(i*segment) fwd(tooth_size.y) {
+                        groove_scale() cubi(tooth_size, fillet=0.5, edges=EDGES_X_ALL);
+                        if (i%2 == 0) {
+                            left(backplane_rim_size.x/2 + joiner_base/2) fwd(joiner_size.y/3) left(-joiner_size.x/2) groove_scale() cubi(joiner_size, fillet=2, edges=EDGES_Z_ALL);
+                        }
+                    }
                 }
             }
-            left(backplane_pip_slideout + 11) if (is_model_strict(MODEL_HARNESS_BOTTOM_PIP)) {
-                joiner_size=[7 + (groove?backplane_pip_slideout:0), backplane_rim_size.y, backplane_rim_size.z];
-                scale(groove ? 1.02 : 1) left(-joiner_size.x/2) cubi(joiner_size, fillet=2, edges=EDGES_Z_LF);
-            }
         }
         
     }
@@ -244,7 +249,7 @@ module phone_harness() {
         d1=8.8;
         d2=14;
         p=[ps.x/2, ps.y/2-24, -0.88];
-        h=30;
+        h=22;
         translate(p) yrot(90) down(10) cylinder(h=h, d1=d1, d2=d2);
     }
     module right_cutout() {
@@ -275,7 +280,7 @@ module phone_harness() {
         s=[buttons_cutout_size.x-2, 4, buttons_cutout_size.z-0.5];
         p=buttons_cutout_pos;
         t=socket ? 0.2 : 0;
-        pin_size=[3 + t, 3 + t, s.z+1.4 + t/2];
+        pin_size=[3 + t, 3 + t, s.z+2 + t/2];
         touch_size=[2, s.y, 2];
         touch_power_size=[3, touch_size.y, touch_size.z];
         translate(p) {
@@ -395,8 +400,8 @@ if (!is_undef(validation)) {
         if (!is_undef(xray)) {
             if (xray == XRAY_POSITIVE) {
                 span_cube([0,1000], [0,1000], [-1000,1000]);
-            } else if (xray == XRAY_BACKPLANE) {
-                span_cube([-1000,1000], [-1000,1000], [-1000,-7]);
+            } else if (abs(xray) == XRAY_BACKPLANE) {
+                span_cube([-1000,1000], [-1000,1000], [-1000*sign(xray),-6]);
             } else if (xray == XRAY_BOTTOM) {
                 span_cube([-1000,1000], [-1000,1000], [-1000,0]);
             }