diff --git a/mount.scad b/mount.scad
new file mode 100644
index 0000000..cca6da8
--- /dev/null
+++ b/mount.scad
@@ -0,0 +1,75 @@
+// unit: mm
+// cannot be used standalone
+// create a new .scad file, defined the following variables and include this file:
+
+/*
+pcb_width=85;
+pcb_length=36;
+pcb_hole_left=2.5;
+pcb_hole_top=2.5;
+plate_pcb_left=6;
+plate_pcb_top=6;
+plate_height=3;
+standoff_height=30;
+standoff_hole=2.5;
+standoff_wall=1.5;
+mounting_hole_left=25;
+mounting_hole_top=10;
+mounting_hole_dia=3;
+mounting_hole_depth=1.5;
+mounting_hole_angle=45;
+*/
+
+epsilon=.1;
+
+standoff_radius=standoff_hole/2+standoff_wall;
+standoff_hole_radius=standoff_hole/2;
+plate_width=pcb_width+2*plate_pcb_left;
+plate_length=pcb_length+2*plate_pcb_top;
+standoff_xpos=pcb_width/2-pcb_hole_left;
+standoff_ypos=pcb_length/2-pcb_hole_top;
+mounting_hole_xpos=plate_width/2-mounting_hole_left;
+mounting_hole_ypos=plate_length/2-mounting_hole_top;
+mounting_hole_offset=tan(mounting_hole_angle)*mounting_hole_dia/2;
+mounting_hole_aperture=tan(mounting_hole_angle)*(plate_height-mounting_hole_depth+mounting_hole_offset);
+mounting_hole_radius=mounting_hole_dia/2;
+
+echo(str(
+	"standoff_radius: ", standoff_radius, "\n",
+	"standoff_hole_radius: ", standoff_hole_radius, "\n",
+	"plate_width: ", plate_width, "\n",
+	"plate_length: ", plate_length, "\n",
+	"standoff_xpos: ", standoff_xpos, "\n",
+	"standoff_ypos: ", standoff_ypos, "\n",
+	"mounting_hole_xpos: ", mounting_hole_xpos, "\n",
+	"mounting_hole_ypos: ", mounting_hole_ypos, "\n",
+	"mounting_hole_offset: ", mounting_hole_offset, "\n",
+ 	"mounting_hole_aperture: ", mounting_hole_aperture, "\n",
+	"mounting_hole_radius: ", mounting_hole_radius
+));
+
+union() {
+	for (x = [-1, 1], y = [-1, 1]) {
+		translate([standoff_xpos*x, standoff_ypos*y, plate_height]) {
+			difference() {
+				cylinder(standoff_height, standoff_radius, standoff_radius);
+				translate([0,0,-epsilon]) {
+					cylinder(standoff_height+2*epsilon, standoff_hole_radius, standoff_hole_radius);
+				}
+			}
+		}
+	}
+	difference() {
+		translate([-plate_width/2,-plate_length/2,0]) {
+			cube([plate_width,plate_length,plate_height]);
+		}
+		for (xy = [-1, 1]) {
+			translate([mounting_hole_xpos*xy, mounting_hole_ypos*xy, -epsilon]) {
+				cylinder(plate_height+epsilon, mounting_hole_radius, mounting_hole_radius);
+			}
+			translate([mounting_hole_xpos*xy, mounting_hole_ypos*xy, mounting_hole_depth]) {
+				cylinder(plate_height-mounting_hole_depth+epsilon, mounting_hole_radius, mounting_hole_aperture);
+			}
+		}
+	}
+}