[sanddrag]

I'm a little concerned about rule R21-G with some of the things mentioned in this thread. Perhaps I'm misinterpreting the rule. The picture seems to paint a pretty clear limitation of a 1" limit on hard parts. The 1" limit in the picture is placed over the inside and outside surfaces of the bumper plywood. Many great attachment methods need more than the remaining 1/4" inside the plywood after using 3/4" plywood, thereby seemingly exceeding this 1" hard parts limit.

What am I missing here?

Is there not actually any limit to how far the "hard parts" can stick inside your robot? Can someone point me to some rule or clarification that indicates this?