[GeeTwo]

Channel and angle are certainly accessible to more teams; We don't have any real ability to work sheet metal efficiently and effectively.

Most of the places that I have seen sheet metal used effectively that I could not even imagine how to do with angle/channel (short of a whole lot of welding, and reducing strength) were in the form of manipulators, for example some relatively flat claws with rollers between the two sheets such as were used by several ball pickups for Aerial Assist and a number of RC grabbers for Recycle Rush, and long arms with lots of lightening that looked almost like cantilever bridges until you got a bit closer.

Most of the chasses based on sheet metal appear to be executable in angle or channel extrusion for not a whole lot of additional weight, though I will admit that these are appearances, and quite possibly deceiving.