Welcome, Lar...sounds like big plans in store...all sound GREAT!!...like the others, pictures are always of interest here...I especially wanna see the seat boxes you describe...
Tongue weight...too heavy or too light?...many times this can be resolved by moving boat and winch-stand forward or back...usually doesn't require much...generally easier than moving axles ...note...you may want to finish installation of seat-boxes, windass, etc prior to adjusting weight on trailer...keep us posted on your progress...
