I'll answer my own question. Technically, the universal wedge that came with my Reese Revolution will work with my Pro Series 20K hitch. But, as I stated in my original post I had a problem hooking up. What I've learned is that there is a custom wedge for my particular hitch combination. I ordered it and installed it. It definitely makes hooking up easier. However, I still have to line up pretty well for a smooth hook up. Putting a line on my pin box and another line on my rear window and using my rear view mirror rather than turning back solved the line up problem. I guess this was one of those things I just had to figure out on my own.
Andy & Carole
2014 Winnebago Itasca Navion iQ 24V
2015 Ford C-Max toad / Blue Ox Alpha / RVi Brake