I made a wooden bracket that I fastened to a treadmill with two C clamps. It works like a charm, it has speed control and a timer, what more do you need. I used a plastic drum from a weed sprayer, and if I wanted to get a couple more drums, the treadmill would have had room for three drums turning at a time. Cost was zero, and about an hour of time.
My great friend copied a Thumlers Tumbler.
What ever I come up with, do I have to but adgitators ((or baffles of some sort) inside?
Yes!! If not your brass is just going to lay at the bottom and the drum spins around the brass.
Thanks, I suspected as much.
I'm actually going to ditch the belt and bed, shorten the frame and allow the tank to spin between the two rollers.