Well, it looks like we lightened this up just a little TOO much. We took the kids out tubing the other day, and since we had one of the seats installed, we used it.. Well, it lasted about 1/2 an hour and someone ended up sitting on the deck.

The shelf pins that we used for the rear pivots are attached with only one screw and they twisted on that screw such that the entire seat came out of the mount. we had some suspicions about this before and its good that we figured this out before we got both seats installed.