[dtengineering]

In lieu of an orthgraphic to determine what is inside and what is outside of the bumper perimeter, I will assume that the bumper perimeter is formed by the four outer corners of the frame (the low part that the axles mount to) and that the entire robot fits within a vertical projection of this perimeter.

The rule violation as I see it from this drawing is a relatively minor one. The c-channel at the front and back extends beyond the outside rail. This means that you would either need to run a structural member to support the bumpers from one overhanging end of c-channel to another... or simply cut off the parts of the C-channel that go beyond the corner.

My guess is that you are planning to do this in real life, but it just hasn't shown up on the CAD drawings yet.

As far as other feedback goes, do you have a mechanism set up so that when you suck balls in that you don't end up with spaces between them as they climb the tower? If you are lifting them with just one belt have you considered that they will slow as they round the corner at the top end?

Jason