dose anybody know about vacum form stuff/? IS IT BETTER TO USE PEG BOARD OR// sheet metel with tiny little holes holes almost like screen for puling the air through andwhats better?

While the smaller holes probaably are better, every article on building a vacuum box for forming shows pegboard, probably for price and availability.  Maybe non-plated Perfboard  sold for electronic circuit building might be an affordable compromise  for cost and durability, as well as the fine hole structure?