great work Worntorn, I have a similar set-up that I use with a cutting torch I used a Power wheelchair motor with a gearbox that was set up for 24v and just run it at 12v Off a small power supply. it runs about the same speed yours shows and works great. I took the tire off the wheel then mounted a plate to the wheel as my cutting base with the torch set up I dont have to worry about ground but once I get my plasma cutter I will probably have to make a brush set up like your talking about.