The double seat base that Grizzly Jig sells will hold you guys with no problem. Most of the weight is on the outside edges and it is tough built system. Looked them over too while I was down there. OneBadChampion picked one up. He and his partner are good size boys. I am sure it is more stable than the Add-a-Seat that I used the last 3-4 years. Only down fall i see to it is they are heavy and can be a pain to move from back deck to front. I had the same style four legged bases for a year or so. Easy seat had its own 4 legged base. They are around $40 at cabelas. They were a little heavy and a hassle to move also. I would like to install some bases in mine also but scared of putting them and not liking them. I like to be able to move them around a little for different size people i fish with. Cumberland has a nice setup but a little pricey. DoubleD bought a nice setup that looks as tough as they come. It was made by a member on here that makes seat bases as well as holders. Maybe he will chime in. Some of the best riggers I know use $15 folding chairs. So don't think to much into a perfect setup.