Rock tumbler,multiple set ups

A rock tumbler that requires 8 bearings (4 per unit) so you dont have friction,the tubes you need you can get in any hardware store,designed to fit either 40mm or 50mm tube/pipe,pvc tube does the job for me, all you need is the gearing,later on i will ad some gears to it,the bearings you get on ebay ABEC-5 608-ZZ,the center is 8mm,i used alu rods (dont need the pins if you go for rods).
basically,just downloading the face file,canister and lids,the rest you can design as you need (the adaptor