Thanks for the encouragement guys. The diffusors were easier, in that plenty of info exists on the web, and the theory and implementation is easy.
I'm also going to do some well type, Schroeder based diffusors.
Bass traps are a little more difficult. I want to do a membrane type, rather than just a rigid fiberglass panel. So I'm going to bend some ears on the topic, and see if I can build some really, really effective ones that aren't huge. And see about how broadband I can get it. In short, there is a lot I need to learn about it before I attempt it. I need to do some homework.
I hate doing anything half baked, then only to find out that if I did a bit more research, I could have done it better.
Is the foam pretty easy to work with (i.e. clean cuts, etc)?
No. Definitely not. It galls and wants to attach itself to the blade as it's being cut. It also oscillates and wanders as it's being cut, it can be quite dangerous. We have a saw with a sliding table that feeds into the saw, so the operators hands are nowhere near the blade. I wouldn't recommend cutting strips on a small table saw. Too dangerous. If you don't have extremely powerful dust collection, forget it. The chips fly everywhere, and due to static, cling to everything, and I mean everything.( clothes, the floor, machinery, your hair, the foam itself). You can't blow it off, the static charge is very strong.
I will update you guys on my bass trap findings.
Cheers
