diff --git a/main.scad b/main.scad
index ecab914..5bee777 100644
--- a/main.scad
+++ b/main.scad
@@ -9,6 +9,7 @@ use <BOSL/sliders.scad>
 //validation = 1;
 XRAY_POSITIVE=1;
 XRAY_BACKPLANE=2;
+XRAY_BOTTOM=3;
 //xray = 2;
 
 // EXPORT:
@@ -18,7 +19,8 @@ MODEL_HARNESS_BOTTOM_PIP=3;
 MODEL_HARNESS_TOP=4;
 MODEL_HARNESS_SLIDER_FRONT=5;
 MODEL_HARNESS_SLIDER_BACK=6;
-export=3; // [0:6]
+MODEL_HARNESS_BUTTONS=7;
+export=0; // [0:7]
 function is_not_export() = is_undef(export) || export == 0;
 function is_export() = !is_not_export();
 function is_model_strict(m) = is_export() && export == m;
@@ -57,7 +59,7 @@ module phone_harness() {
     rim_edge_tolerance=0.4;
     expose_back_camera=false;
     screwmount_screw=3;
-    harness_divider=[16, 0, 1.3];
+    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];
     
@@ -151,11 +153,19 @@ module phone_harness() {
     rail_wall=1;
     slider_slop=0.1;
     slider_len_back=hs.x*0.3;
-    slider_len_front=hs.x*0.3;
+    slider_len_front=hs.x*0.15;
     module harness_slider(l) {
         base=2;
         ss=[l, shell_rim_wall, rim_size.z+rail_wall*2];
-        up(ss.y + base) xrot(180) slider(l=ss.x, w=ss.z, h=ss.y, base=base, chamfer=0.9, wall=2, ang=rail_angle, slop=slider_slop, orient=ORIENT_X, align=V_UP);
+        up(ss.y + base) xrot(180) difference() {
+            slider(l=ss.x, w=ss.z, h=ss.y, base=base, chamfer=0.9, wall=2, ang=rail_angle, slop=slider_slop, orient=ORIENT_X, align=V_UP);
+            screws=2;
+            screws_area_l=0.7*l;
+            for (i=[0:screws-1]) {
+                $fn=$preview ? 6 : 16;
+                #right(-screws_area_l/2 + screws_area_l/(screws-1) * i) cylinder(d2=screwmount_screw*0.5, d1=screwmount_screw, h=ss.y/2);
+            }
+        }
     }
     module harness_rail(l) {
         sw=2;
@@ -246,13 +256,53 @@ module phone_harness() {
     }
     
     // -- FRONT --
+    buttons_cutout_size=[42, 100, 4.5];
+    buttons_cutout_pos=[ps.x/2 - 44.5, -ps.y/2 - 3, 0.25];
     module buttons_cutout() {
-        s=[42, 100, 5];
-        fwd(ps.y/2) right(ps.x/2 - 44.5) cubi(s, fillet=1);
+        s=buttons_cutout_size;
+        p=buttons_cutout_pos;
+        translate(p) cubi(s, fillet=1);
     }
     module front_cutout() {
         buttons_cutout();
     }
+    module front_buttons(socket) {
+        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];
+        touch_size=[2, s.y, 2];
+        touch_power_size=[3, touch_size.y, touch_size.z];
+        translate(p) {
+            cs=[4, s.y, s.z];
+            left(5) {
+                bs=[13, s.y, s.z];
+                left(bs.x/6) cubi(pin_size);
+                left(bs.x/2) {
+                    difference() {
+                        cubi(bs);
+                        back(2) cubi(cs);
+                    }
+                }
+                fwd(1) left(bs.x*0.8) cubi(touch_power_size, fillet=1);
+            }
+            right(8) {
+                bs=[18, s.y, s.z];
+                cubi(pin_size);
+                difference() {
+                    cubi(bs);
+                    back(2) {
+                        left(bs.x/4) cubi(cs);
+                        right(bs.x/4) cubi(cs);
+                    }
+                }
+                fwd(1) {
+                    left(bs.x*0.4) cubi(touch_size, fillet=1);
+                    right(bs.x*0.4) cubi(touch_size, fillet=1);
+                }
+            }
+        }
+    }
     
     // ==== MODEL ====
     
@@ -281,6 +331,7 @@ module phone_harness() {
                 shell();
                 shell_rim_edge(rim_edge_thickness, groove=true, tolerance=rim_edge_tolerance);
                 shell_cutouts();
+                front_buttons(socket=true);
             }
         }
         shell_backplane(groove=false);
@@ -291,11 +342,13 @@ module phone_harness() {
             difference() {
                 shell();
                 shell_cutouts();
+                front_buttons(socket=true);
             }
         }
         difference() {
             shell_rim_edge(rim_edge_thickness, groove=false);
             shell_cutouts();
+            front_buttons(socket=true);
         }
     }
     module model_harness_slider_front() {
@@ -307,6 +360,9 @@ module phone_harness() {
     module model_harness_slider_back() {
         back(hs.y/2) xrot(-90) harness_slider(slider_len_back);
     }
+    module model_harness_buttons() {
+        front_buttons(socket=false);
+    }
     
     if (is_model(MODEL_HARNESS_LEFT)) model_harness_left();
     if (is_model(MODEL_HARNESS_RIGHT)) model_harness_right();
@@ -317,6 +373,7 @@ module phone_harness() {
     if (is_model(MODEL_HARNESS_TOP)) model_harness_top();
     if (is_model(MODEL_HARNESS_SLIDER_FRONT)) model_harness_slider_front();
     if (is_model(MODEL_HARNESS_SLIDER_BACK)) model_harness_slider_back();
+    if (is_model(MODEL_HARNESS_BUTTONS)) model_harness_buttons();
 }
 
 module model() {
@@ -335,6 +392,8 @@ if (!is_undef(validation)) {
                 span_cube([0,1000], [0,1000], [-1000,1000]);
             } else if (xray == XRAY_BACKPLANE) {
                 span_cube([-1000,1000], [-1000,1000], [-1000,-7]);
+            } else if (xray == XRAY_BOTTOM) {
+                span_cube([-1000,1000], [-1000,1000], [-1000,0]);
             }
         }
         union() {