diff --git a/air_tank_mount.scad b/air_tank_mount.scad
new file mode 100644
index 0000000..3627a46
--- /dev/null
+++ b/air_tank_mount.scad
@@ -0,0 +1,65 @@
+$fn = 100;
+
+bottle_dia = 45;
+axleradius = 2.4;
+axlemesh = 1.85;
+axleround = 0;
+
+air_tank_mount_v2();
+
+module air_tank_mount_v0() {
+    difference() {
+        translate([-24, -24, 0]) cube([48, 48, 8]);
+        translate([0, 0, -1]) cylinder(r=22.5, h=72);
+        translate([-20, -20, 4]) dualhole(true);
+        translate([-20, 20, 4]) dualhole(true);
+        translate([20, -20, 4]) dualhole(true);
+        translate([20, 20, 4]) dualhole(true);
+    }
+}
+
+module air_tank_mount_v1() {
+    difference() {
+        translate([-24, -24, 0]) cube([48, 48, 8]);
+        translate([0, 0, -1]) cylinder(r=22.5, h=72);
+        translate([-20, -20, 4]) dualhole();
+        translate([-20, 20, 4]) dualhole();
+        translate([20, -20, 4]) dualhole();
+        translate([20, 20, 4]) dualhole();
+    }
+}
+
+module air_tank_mount_v2() {
+    sz = ceil((bottle_dia+2.4)/8)*8;
+    difference() {
+        translate([-sz/2, -sz/2, 0]) cube([sz, sz, 8]);
+        translate([0, 0, -1]) cylinder(r=bottle_dia/2, h=72);
+        translate([-sz/2+4, -sz/2+4, 4]) axle();
+        translate([-sz/2+4, sz/2-4, 4]) axle();
+        translate([sz/2-4, -sz/2+4, 4]) axle();
+        translate([sz/2-4, sz/2-4, 4]) axle();
+//        translate([-25, -25, 4]) cube([50, 50, 8]);
+    }
+}
+
+module axle(h = 24) {
+    union() {
+        cube([axleradius*2-axleround*2, axlemesh-axleround*2, h], center=true);
+        cube([axlemesh-axleround*2, axleradius*2-axleround*2, h], center=true);
+    }
+}
+
+module hole() {
+    union() {
+        cylinder(r=2.4, h=8);
+        translate([0, 0, -0.1]) cylinder(r=3, h=0.8+0.1);
+        translate([0, 0, 7.2]) cylinder(r=3, h=0.8+0.1);
+    };
+}
+
+module dualhole(both = false) {
+    translate([0, 4, 0]) rotate([90, 0, 0]) hole();
+    if (both) {
+        translate([4, 0, 0]) rotate([0, -90, 0]) hole();
+    }
+}