I acquired a blue Pacific Deluxe powder measure for my collection, but didn't get the instruction sheet with it. I am trying to dismantle it and clean up the measure piston bore, but don't know how to take the measuring piston out of the rotor. There is a screw on one side with a knurled knob on it which unscrews easily, but the piston still doesn't move. I took the two screws out of the handle and removed the handle, and it appears that there is another clamp screw under one of the handle screws. But I have not been able to remove that one yet. If anybody happens to have one of these powder measures with the instructions, or has removed the powder measure piston clamp screws and removed the piston from the rotor, maybe you can give me some help with this project? I would appreciate any help.