I am looking at buying a 20x24 Besler vacuum easel that does not have a vacuum p ump. I would like to buy a regular industrial vacuum pump so that I can locate it outside of the darkroom and get away from the noise and vibration. I would r ather not use a regular home vacuum cleaner because of those reasons. Can someo ne give me some idea of the specifications on a vacuum pump that should work eas ily? Sincerely, Jerry