I made a tumbler a year or so back using a treadmill motor and rollers... I made a drum out of 6 inch pvc with a screw in lid but I never go around to putting paddles in it to help agitate the brass... I was wondering if a few strips of hardwood screwed n glued to the inside walls of the pvc might hold up long enough to bother with? I am wondering if any of you have done it? Thanks in advance!