The last time that I got a set of Millenium cylinders, I ended up using two Dremel tools to cut fins and grind bottom edges. A suggestion I received was to use a die grinder. I just ordered an air compressor and a mini die grinder. When I last tore the topend apart, I went through two cans of compressed air. This is more expensive but will be quicker and more thorough. The garage cleaning is going slowly. Trying to toss out as much as I can.