I posted some pictures in the Gallery of my Max IV with home made pontoons. It can now haul over 700 pounds in the water. The Pontoons are made from 8 inch PIP water pipe (80 psi) with 4 100 psi caps glued on. The pontoons pivot off the roll cage and are pinned to the roll cage using 5/16 " grade 5 pins through steel strut. I used 5/16" all thread for U-bolts around pontoons and ran plastic tubing around U-bolts and a block of rubber between the pontoon and the strut. The pontoons are 9 feet long. It works really well, I float much higher and is very stable on deep water
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Max IV with Pontoons.
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