On Wednesday, February 12, 2014 3:22:48 AM UTC-8, Karl Townsend wrote:
I'm looking at hauling a heavy boat (7K with the standard trailer)

2000 miles twice a year...



A perfectly designed 5th wheel or gooseneck would be far more stable

than the standard bumper hitch. I've been looking and can't find one

to copy (my best design method)



Does anyone know of an engineering design service for this project?

I'm very willing to pay for a great design.



Karl

Why not design your own? Use it as an excuse to learn CADCAM and FEA.