I want to pick up a fast vacuum pump on ebay but I am not sure what one would be the best choice to hold down guitar bodies and small parts. I was going to make my own custom vacuum hold downs using star board 3/4" thick and screw them in place on my spoil board and use index pins for the guitar bodies. I see a lot of the oil less 1/3hp pumps at different prices but I am not sure what spec would be the best for my application any help here would be great.

Thanks