I made one from the guts of a VV Gripper that I had laying around. It's not pretty, but it does function. Bought an 18650 battery holder with leads from Amazon, along with 10 oz. of JB Weld, and now I have an Altoids tin mod. All I did was drill a couple of holes in the tin for the 510 connection, and the fire button, laid out my electronics from the VV Gripper, and poured in the JB Weld after I mixed it. It weighs a ton, but everything works as it should.