[Russ Beavis]

FYI - a 6" bumper plywood backing attached to a 3" metal bar will not pass inspection since it's not supported along its entire length. For example, with a rectangular robot that is the max 28"x38", the opening can be, at most, the length of the edge minus 12". You can build a build that fits in the 28"x38" sizing box at a slight angle and use a marginally larger opening but you'd be building a very thin robot.

If Paul is right and your leading edges are small, the inspectors will give you a hard time and probably ask you to modify your chassis.

Better now than in 2.5 weeks.

Russ Beavis
Chief Inspector