[Herodotus]

Originally Posted by EricH

Nah, just the access is blocked. Without the Balrog, it's wide open.

Mithril may, however, fall under the metal type Unobtanium.

Kit frame, or if you like custom, 1" by 1"-2" by 1/8" wall tubing is pretty good for a drive frame. Higher up, 1/16" wall works well. Thing about the drive base is, it takes a beating even with the bumpers, so 1/16" wall might not be the best option. (Then again, properly braced and with a decent material on top, 1/16" can support a robot climbing on top of it, so...)

I believe we only used 1/8th wall thickness in four pieces of the base frame, those being the four blocks that the axle( a dead axle) for the wheels go through. We did have one incident at Western where we hit the wall and bent our entire frame, but we fixed it, and then glued a solid piece of diamond plate at the weak point to give it a little more structure, without too much weight increase. If we had just incorporated a few triangles into the base in the first place it probably wouldn't have been an issue at all.