Hi Jeff Harry-o here Ihave built vacuum clamping for my wood shop and built vacuum machine myself . Works very good. There are several sight you can go to one is www.joewoodworker.com
I envy all you guys with this CNC knowledge I'm a retired tradesman just learning now. I would give more sites but dont have them on me and dont know how to post them automaticaly HA HA but i can build a vacuum system. It can be done for much less than commercial baught unit if you have build skills.