diff --git a/scad/jk_rails.scad b/scad/jk_rails.scad
new file mode 100644
index 0000000..f523272
--- /dev/null
+++ b/scad/jk_rails.scad
@@ -0,0 +1,45 @@
+include <./common.scad>;
+
+RAIL_SPACING = 100;
+RAIL_H = 70;
+RAIL_LEN = 400;
+RAIL_D=25.4;
+
+module rail (H = 100) {
+    cylinder(r = R(RAIL_D), h = H, center = true, $fn = 60);
+}
+
+module rails () {
+    translate([RAIL_SPACING/2, 0, RAIL_H]) rotate([90, 0, 0]) rail(RAIL_LEN);
+    translate([-RAIL_SPACING/2, 0, RAIL_H]) rotate([90, 0, 0]) rail(RAIL_LEN);
+}
+
+module end () {
+    L = 50;
+    T = 20;
+    translate ([0, -L / 2, 0]) {
+        difference () {
+            union () {
+                translate([RAIL_SPACING/2, 0, RAIL_H]) rotate([90, 0, 0]) {
+                    cylinder(r = R(35), h = L, center = true, $fn = 60);
+                }
+                translate([-RAIL_SPACING/2, 0, RAIL_H]) rotate([90, 0, 0]) {
+                    cylinder(r = R(35), h = L, center = true, $fn = 60);
+                }
+                translate([0, 0, RAIL_H + (35 / 2) - (T / 2)]) cube([RAIL_SPACING, L, T], center = true);
+                translate([RAIL_SPACING/2 - (5 / 2), 5, RAIL_H / 2]) cube([40, 40, RAIL_H], center = true);
+                translate([-RAIL_SPACING/2 + (5 / 2), 5, RAIL_H / 2]) cube([40, 40, RAIL_H], center = true);
+            }
+            translate([RAIL_SPACING/2, 0, RAIL_H]) rotate([90, 0, 0]) {
+                rail(L + 1);
+            }
+            translate([-RAIL_SPACING/2, 0, RAIL_H]) rotate([90, 0, 0]) {
+                rail(L + 1);
+            }
+        }
+    }
+}
+
+
+//color("blue") rails(); 
+translate([0, RAIL_LEN / 2, 0]) end();
\ No newline at end of file