I've been on a search to find a good motor base for the 3005. I had 3 bases in the cupboard. The Premier was too small for the drum. The Chromega rotated fine but it has a built in side to side wobble which seems to interfere with the internal design of the tank leading to irregular development. The Unicolor Uniroller works, but at a slow 15 rpm. I picked up a Beseler (the one with the separate reversing switch) and it rotates at 33rpm but I had to modify the keeper channel to clear the band in the middle of the drum. Hope this saves someone legwork.