Quote Originally Posted by EricSchimel View Post
Funny I was just thinking about using HDPE for a new plenum next time I get through my spoilboard. Did you have an MDF plenum prior? If so, how much more suction are you getting now?
I have a better groove system with the starboard. Deeper and more grooves closer together. I'd assume it's better hold down than the lacquered mdf board I started with. But I didn't do any real tests.

The starboard one should outlast me though, and is super stable. I go use 12 machine screws to hold it to the aluminum top on my shopbot. It's a home brew setup.