[Gary Dillard]

just a quick safety reminder - even though the extruded fiberglass looks and feels pretty solid, it's still fiberglass. If you cut it and/or drill it, you expose a bunch of tiny glass fibers that hurt and itch like heck if (when) they get on your skin, especially your fingers. Be sure to seal them up good and use gloves when handling.

Also, engineering wise remember that the elastic modulus of fiberglass is on the order of 100-300 ksi versus aluminum which is 10 Mpsi, so check your deflections if it's going to be highly statically loaded. Conversely, this makes it better than aluminum for absorbing shock coming from "rigorous interaction with other robots" (except a direct hit since it's more brittle) since the spring rate is much lower.