I received my Gast replacement pump today and switched it out. It seems to be working fine. Surplus Center promptly sent a replacement and a shipping label for the defective one. According to my gauge I am registering 25 with the Oneway 3.5 inch chuck. In researching past threads, 18-25 seems to be a good number. BTW, some say that are pulling so many "hg" and some say "inches." Could someone explain that? Also, what is a good (and safe) number to be pulling to do the bottom of bowls?

Just want to say thanks to Steve Schlumpf. I basically copied his system, with a few minor modifications, keeping everything on the same side like Bob Justin's. So thanks guys!

Jeff