[Karibou]

Originally Posted by skimoose

Team 228 turned aluminum pins which were inserted into holes in the frame and held to the frame with hairpin cotter pins from McMaster. The bumpers were held onto the pins with larger hairpin cotter pins as can be seen in this photo:

The bumper brackets were 0.125" aluminum angle bored to the OD of the pins on one flange and bored for deckmate screws into the bumper plywood. This system only required the pulling of 14 cotter pins to remove the bumpers and reinstall. We averaged under 5 minutes to remove/install all the bumpers.

This is very similar to what we did for 2009, and it worked fairly well for us. The bracket may have been the AM one, but I didn't make the bumpers, so I'm not sure. However, we had some issues with getting a few of the pins in - issues with lining up the brackets with the frame exactly, and a few of the pins had to be pushed in at EXACTLY the right angle...while using a hammer. If the pins had gone in a bit more smoothly, we would have had a much easier time. I have the feeling that we'll also be modifying our system this year (game pending), but the pins are much easier than what we've used in the past, so we might just stick with them.