rockytopper,
It is actually the styrofoam billets that Dow makes. If have PDF files of the plans if anyone wants them. I hinged it at the shore (not shown) by putting a 1" galvanized pipe thru the 4x4 posts and dock and then another galvanized pipe thru eye hooks located between the dock and the raft. That allows the raft to float up and down with the fluctuating water levels I have. It has worked pretty good so far. The hinging at the raft and placing a billet under the end of the dock, eliminated the tipping you were talking about rocky.
