Re: storage space - taking foam out
Well, removing the foam lowers the flotation properties of the boat. Should you swamp it or develop a serious leak, the boat could sink, rather than stay afloat, as it's designed to do.
That would stop me from removing foam, frankly. I'd love to have storage in my little aluminum boat, but I'm not willing to lose the safety of the flotation.
What I did do, though, was to build boxed in sections along one side of the boat, between the bench seats. They're 9 1/2" wide, and level with the seats, running from the back seat clear to the front. On the inside edge of each shelf, I added another board, that reaches down to the hull and hinged parts of each shelf. I can't put tackle boxes in those storage compartments, but other stuff fits in there.
The big advantage to this is that I can put my tackle boxes on the shelf and get them off the floor. I also built a retainer for the gas tank on top of the shelf, just in front of the center seat...getting it off the floor of the boat, too. It's made a world of difference for me, and redistributed some weight, too.