Thanks. My boat is a flat bottom jon. The motor is no problem because I don't have an outboard, electric only.
If I do this, I think I will lay a 2X4 under the Ultimate bunks for extra strength, and to eliminate any possible flexing.
So is the 4.5" between bottom of boat and top of trailer frame about normal?
If I bolt a 2X4 to my galvanized trailer, is it OK to use treated wood?