I bought a used mamba (love it btw), and the previous owner pretty much got "creative" with the seat. It was off the side-rail hangers (a single bolt on each side), resting on the floor of the boat with no foam under it. Rides a little sloppy to say the least! When I remounted the seat to the side rail hangers, it came off again (plastic not happy now) as I did not put any additional support under the seat. Before I start the process over, I was wondering about how a fresh factory seat install should look, as far as support from the bottom and proper washers and brackets for the side rail hanger support. Any advice, inpout welcome.