[thefro526]

Originally Posted by squirrel

If you can make angles or channels from polycarbonate, you can make a light, rigid structure. It's not easy to bend it a full 90 degrees though. You can bend it with a brake, and adding heat from a heat gun helps, but still it's not easy to do it.

McMaster car sells polycarbonate in most common shapes, Angles, U-Channels, Tubes, etc, so building a rigid structure from some off the shelf polycarbonate pieces wouldn't be all that difficult. And as far as I can tell, any form of Polycarbonate seems to be legal, since the manual doesn't refer to any specific shape or form in the same way they do with Aluminum.