My understanding is we are trying to prevent a fore and aft oscillation at top of transom so by putting the engine leg at 30 to say 45 ' and supporting with a transom saver I am doing good to my transom . Also the transom is sitting and being supported by trailer runners.
Most of all a heavy weight can wreck your back . So even if it shortens transom life which I doubt. I know which choice I would make.
P'S keep a safety wire or other for security and losing it in transit.
__________________
|