[galewind]

we found that using 1/8" angle on our bumpers caused us to go over the 15 lb limit, so we had to eliminate some of the angle to make bumper weight. If they're being picky about standard bumpers, I feel that they need to be a bit more specific regarding the building materials.

That being said, we did not adhere to the "Blind fastener" system in figure 8-1 in the manual, yet they accepted them at NJ. We attached small pieces of 1" tubular to the bumper that we then bolted into the frame perpendicularly (our machine frame was built out of 1" tubular). This was actually a lot easier to unfasten than the system they suggest in figure 8-1, that we used last year.