OK, thanks to Gary I found a used Hurricane Vac and it's on it's way to me. Now I need to start planning the actual table and plumbing. I will do Version 1 out of MDF before I spend a bunch of money on Phenolic and find I made a fatal error.
What sort of fitting is commonly used to attach each pipe to the bottom of the table surface? It appears most pipe with 2" PVC, is Schedule 40 the way to go? Valves, I see some tables with the 1/4 turn ball valves and some with blade style gate valves, any advantages one or the other? It seems the Valterra gate valves can be disassembled and possibly rebuilt if they start to leak... 1/4 turn units look like you will be cutting and splicing pipe back together, or is this something that just doesn't happen? Ball valves are $12 type of thing and gates are $25-$30 each, so it will be more money, but that part I only want to do once if possible.
The actual plenum table, gasket around the perimeter? Any specific grid pattern? How many zones and what size? I plan on using a spoil board on top 99% of the time and could make a pod grid subtable like I saw on some Shop Sabre videos, don't know how often that would come up, and wether the Hurricane has enough true vacuum to accomplish it anyway. Does anybody piggy back a high vacuum pump into the system so that the Hurricane gets you started and then the Hi vac pump can pull you down into the 20" or so range?
Thanks in advance...