[EricH]

Originally Posted by vivek16

Yeh, too bad the balrog destroyed the mine

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...)