diff --git a/strap_link.scad b/strap_link.scad
index c9812f0..b725117 100644
--- a/strap_link.scad
+++ b/strap_link.scad
@@ -1,6 +1,6 @@
 links_count=6; // [1..20]
 include_terminal=true; // [true,false]
-export=4; // [0:5]
+export=5; // [0:5]
 
 MODEL_DEMO=0;
 MODEL_LINKS=1;
@@ -138,7 +138,7 @@ module clip_ratcheting(ratchet_length=20) {
     pin_diam=get_link_pin_diameter();
     slot_slack=get_link_socket_slack();
     size=[clip_size.x+socket_size.x, clip_size.y, clip_size.z];
-    slot_size=[clip_size.x+slot_slack.x, size.y+1, pin_diam+slot_slack.z];
+    slot_size=[clip_size.x+slot_slack.x + 0.2, size.y+1, pin_diam+slot_slack.z];
     entry_size=[slot_size.x-5, clip_size.y+1, clip_size.z];
     //right(clip_size.x/2)
     module hook() {
@@ -158,7 +158,7 @@ module clip_ratcheting(ratchet_length=20) {
         scale([-1, 1, 1]) hook();
     }
     wall=2;
-    tooth_size=[2, 2, 3];
+    tooth_size=[2, 3, 3];
     module tooth() {
         s=[tooth_size.x, tooth_size.z, tooth_size.y];
         up(tooth_size.z/2) xrot(-90) right_triangle(s);
@@ -187,29 +187,35 @@ module clip_ratcheting(ratchet_length=20) {
             difference() {
                 cube([ratchet_length, clip_size.y, clip_size.z], center=true);
                 up(wall/2) cube([ratchet_length, clip_size.y-wall*2, clip_size.z], center=true);
+                right(ratchet_length/2+1) {
+                    slideRailGuide(groove=true);
+                    scale([1,-1,1]) slideRailGuide(groove=true);
+                }
             }
             teethFwd();
             teethBack();
         }
     }
     ratchet_tooth_count=3;
-    ratchet_wall=1;
+    ratchet_wall=3;
+    ratchet_slack=0.3;
+    rail_slack=0.2;
     module ratchetTeethFront() {
         module ratchetButton() {
-            size=[3,wall*4,2];
-            up(4) fwd(wall*2 - ratchet_wall) cuboid(size, fillet=1, edges=EDGES_FRONT);
-            up(2) back(wall/2) cube([size.x, wall, tooth_size.z + size.z], center=true);
+            size=[8,wall*4,4];
+            up(size.z+1) fwd(wall*2 - ratchet_wall) cuboid(size, fillet=1, edges=EDGES_FRONT);
+            up(2) back(ratchet_wall/2) cube([size.x, ratchet_wall, tooth_size.z + size.z], center=true);
         }
-        fwd((clip_size.y-wall*2)/2 - tooth_size.y - 0.5)
+        fwd((clip_size.y-wall*2)/2 - tooth_size.y - ratchet_slack)
         left(ratchet_length) {
             for (i=[0:ratchet_tooth_count-1]) {
-               right(i*tooth_size.x) scale([-1,-1,1]) tooth();
+               right(i*tooth_size.x) scale([-1,-1,0.8]) tooth();
             }
             ratchetButton();
         }
         
         module ratchetWall() {
-            up(tooth_size.z/2) left(ratchet_length/2 + wall - wall/2) fwd(clip_size.y/2-wall-tooth_size.y-ratchet_wall)
+            up(tooth_size.z/2) left(ratchet_length/2 + wall - wall/2) fwd(clip_size.y/2-wall-tooth_size.y-ratchet_wall/2 - ratchet_slack)
             down(wall/2+0.5) cube([ratchet_length + wall, ratchet_wall, tooth_size.z], center=true);
         }
         ratchetWall();
@@ -218,21 +224,47 @@ module clip_ratcheting(ratchet_length=20) {
         scale([1,-1,1]) ratchetTeethFront();
     }
     module ratchetRight() {
-        left(wall/2) cube([wall, clip_size.y, clip_size.z], center=true);
+        left(wall) cube([wall*2, clip_size.y + rail_slack*2, clip_size.z], center=true);
         
         ratchetTeethFront();
         ratchetTeethBack();
     }
+    module slideRailGuide(groove) {
+        size=[ratchet_length, wall, wall];
+        fwd(clip_size.y/2 + rail_slack)
+        left(size.x/2) scale(groove?1.5:1) cuboid(size, fillet=0.5);
+    }
+    module slideRailLeft() {
+        size=[ratchet_length, clip_size.y/2 - ratchet_wall*2 - wall - ratchet_slack - tooth_size.y, clip_size.z];
+        right(size.x/2) cube(size, center=true);
+    }
+    module slideRailRight() {
+        size=[ratchet_length + 3, wall*1.5, clip_size.z];
+        module railFront() {
+            fwd(clip_size.y/2 + size.y/2 + rail_slack) left(size.x/2)
+            cuboid(size, fillet=1, edges=EDGES_FRONT);
+            slideRailGuide(groove=false);
+        }
+        module railBack() {
+            scale([1, -1, 1]) railFront();
+        }
+        railFront();
+        railBack();
+    }
     
     if (is_model(MODEL_CLIP_RATCHETING_A) || is_model(MODEL_CLIP_RATCHETING)) {
         left(ratchet_length + wall + 1) {
             hookLeft();
-            left(0.5) ratchetLeft();
+            left(0.1) {
+                ratchetLeft();
+                slideRailLeft();
+            }
         }
     }
     if (is_model(MODEL_CLIP_RATCHETING_B) || is_model(MODEL_CLIP_RATCHETING)) {
         ratchetRight();
         hookRight();
+        slideRailRight();
     }
 }
 
@@ -249,23 +281,23 @@ if (!is_undef(validation)) {
             right(2*segment_size.x) link();
         }
     }
-} else if (!is_undef(xray)) {
-    intersection() {
-        cube([1000, 1000, 1000]);
-        for (i = [0:links_count-1]) {
-            right(i*segment_size.x) link();
-        }
-    }
 } else {
-    if (is_model(MODEL_CLIP)) {
-        left(get_link_clip_size().x) clip();
-    }
-    if (is_model(MODEL_CLIP_RATCHETING) || is_model(MODEL_CLIP_RATCHETING_A) || is_model(MODEL_CLIP_RATCHETING_B)) {
-        left(get_link_clip_size().x) clip_ratcheting();
-    }
-    if (is_model(MODEL_LINKS)) for (i = [0:links_count-1]) {
-        terminal=(i==links_count-1) && include_terminal;
-        right(i*segment_size.x) link(terminal=terminal);
+    intersection () {
+        if (!is_undef(xray)) {
+            down(50) cube([100, 100, 100], center=true);
+        }
+        union() {
+            if (is_model(MODEL_CLIP)) {
+                left(get_link_clip_size().x) clip();
+            }
+            if (is_model(MODEL_CLIP_RATCHETING) || is_model(MODEL_CLIP_RATCHETING_A) || is_model(MODEL_CLIP_RATCHETING_B)) {
+                left(get_link_clip_size().x) clip_ratcheting();
+            }
+            if (is_model(MODEL_LINKS)) for (i = [0:links_count-1]) {
+                terminal=(i==links_count-1) && include_terminal;
+                right(i*segment_size.x) link(terminal=terminal);
+            }
+        }
     }
 }