I'm working on my old '89 Marlin Skier trying to remove the brackets for the swim deck but can't get to the nuts for the brackets on the inside of the boat. I have removed the gas tank and was able to get the top bolts and nuts off, but the bottom ones seem to be below the floor of the boat. If anyone has removed these brackets before, your advice would be greatly appreciated. The picture shows what the bracket looks like (and why I'm trying to remove it.)