School me on 5th wheel hitches please

I found out the hard way yesterday that the reese revolution pin box does not turn 90° like advertised on a short bed truck. I have a 5 3/4’ truck bed and was backing into my drive when the back window blew up. I was not turning that sharp. Reese advertises this to work but i can assure you it does not. I have a 2013 f-150 super crew and a 2018 flagstaff 8528ikws classic super light with reese revolution pin box. So before plunkingdown your hard earned cash on a new fiver make sure the salesman doesn’t try to snow you about turning in circles with this hitch combo. I also have a reese 16k stationary fifth wheel hitch in the bed. A slider is not supposed to work as it would put too much weight too far back causing a lack of steering or so i have been told.