You are starting off with a very light pin weight to trailer weight percentage
Dry weight 7990----dry pin 1279======16%
GVWR 10,000------16% ===== 1600
5th wheels tow more stable, less chucking when pin weight percentage is 20-25%
With 700# hanging off back you will lighten pin by roughly 280#
With 800 hanging off back -----320#
You think you have issues before (your other post about 5vr pushing) wait til you unload that pin weight and have all that extra weight hanging 32' behind you.
Tail wagging the dog and enough 'chucking' to beat the band.
Thought the idea of a TH was to have a garage for the toys....not hang them off back :H
I won't comment more least words/ideas not expressed end up being attributed to me
