Ever seen the pin box structure and overhead frame on a 5vr.
Compare that wide spread, thin cross beamed structure to a goosneck trailer design.


YES some folks use a gooseneck adapter...and don't have any known damage.
Then some folks who have never used a gooseneck adapter have had a complete frame/pin box failure.
It's your trailer.......use what you want.
Personally I stick with a hitch design that the 5vr frame was designed for......and not add an additional stress.
Enough of that happening with the bouncing going on while traveling on the bad roads.