Great hitch and you got a super price! Don't worry about force on rollers if they are in good shape. I had a full size Bronco with the Pull Rite back in the late '80s, pulled a 26' StarCraft TT from FL to AK 18K never a problem. You will (with practice) get into sites easier and amaze others because they really work. No sway at all even on my short wheel base because the pivot point is about at the rear axle, just like a fifth wheel. You will answer lots of questions from people about your funny hitch. Enjoy...BTW they were well over a grand in the late '80's. :) :)
