Like almost everyone else here, I'm interested in vacuum chucking. Not knowing anything about vacuum pumps, but watching many auctions on the 'bay, I see lots of Gast pumps for sale. Will they all work, or are there different types which are more, less, or even unsuitable for vacuum chucking on a lathe? Any info on models to look for / avoid would be helpful. I'm running 110/115 in my little shop. Thanks, Mike