I'm looking for an stl for a 3D box for a Vamo board. I have one stl now but the wall thickness is too much to allow for using my 510 threads. Here are the threads I am using. $1.88 Replacement 510 Threaded Connector for E-Cig Box Mods - stainless steel / w/ 7cm wire at FastTech - Worldwide Free Shipping . What threaded connector are you folks using? Worse case scenario, I might try enlarging the hole and epoxy my 510 connector into the mod instead of using the nut, but I have never had epoxy hold for the life of a mod.