diff --git a/BLTouch.scad b/BLTouch.scad
new file mode 100644
index 0000000..02879fe
--- /dev/null
+++ b/BLTouch.scad
@@ -0,0 +1,57 @@
+/* mount options */
+wt = 5; // wall thickness (min 5mm for m2 inserts)
+tb = 40;
+bpt = 7;
+
+/* BLT */
+hdb = 18; // mounting hole distance
+wb  = 11; // width of Sensor
+lb  = 27; // length of sensor mounting flange
+mhb = 32.7; // mounting distance from top of base plate
+rc = 2; // radius corners
+
+
+$fn= 100;
+
+module through(l=7, lh=3.3, lt=1, lb=1){
+    union(){
+        translate([0,0,l-lh])cylinder(h=lh+lt, d=5.6);
+        translate([0,0,-lb])cylinder(h=l+lh+lb, d=3.5);
+    }
+}
+
+module m3 (h=8, lt=1){
+    //translate([0,0,-lt])cylinder(h, d=2.5); // tapped M3
+    translate([0,0,-lt])cylinder(h, d=4); // rutex insert
+}
+
+module m2 (h=8, lt=1){
+    translate([0,0,-lt])cylinder(h, d=1.5); // tapped M3
+    //translate([0,0,-lt])cylinder(h, d=3.2); // rutex insert
+}
+
+module mount(){
+    translate([4,4,-12])difference(){
+        hull(){
+            translate([0,0,6])cylinder(h=6, d=8);
+            translate([4,-4,0])cube([0.01,8,12]);
+        }
+        translate([0,0,12])mirror([0,0,1])through(l=10,lb=1,lt=1,lh=7);
+    }
+}
+difference(){
+    hull(){
+        translate([rc,rc])cylinder(h=wb, r=rc);
+        translate([0,mhb-wb/2, wb/2])rotate([0,90,0])cylinder(h=wt, d=wb);
+        translate([lb-wb/2,0, wb/2])rotate([-90,0,0])cylinder(h=wt, d=wb);
+    }
+    z = wb/2;
+    for(x=[(lb-hdb)/2,(lb-hdb)/2+hdb,lb/2]){
+        translate([x,0,z])rotate([-90,0,0])m3(h=8);
+    }
+    for(y=[mhb-wb/2,mhb-wb/2-15]){
+
+    }
+    translate([0,mhb-6.65,5.9])rotate([0,90,0])through(l=lb+3, lh= lb);
+    translate([0,mhb-6.65-15,5.9])rotate([0,90,0])through(l=lb+3, lh= lb);
+}