[Chris is me]

Originally Posted by JesseK

PINK had one rule misinterpretation when they went through inspection, however. They used the rectangle as the FRAME PERIMETER, yet it was weighed and inspected as part of the bumpers. Unfortunately, this caused them to violate the 8" rule for bumpers, even though the inspectors agreed that it was structurally sound. They found a way to appease the rulebook, but the situation does provide insight into how to update the design for next year, assuming the same rules. Technically, the bumpers have to be removable within 10 minutes - thus each rectangle can be a different frame perimeter "configuration", and a student can work for 10 minutes to demonstrate that the bumpers are removable from the rectangle with some effort.

If you look at 33's (frankly, brilliant) design, they fix this issue by adding a flange to their outermost "real" frame members which extends over the bumper mounted frame. Thus the frame perimeter is defined by this flange and the bumper frame tucks under it. There are plenty of ways to do this with WCD style frames using "cheater" structural members such as thin plate to extend out and form the frame perimeter. I imagine 233 did something like this.