Thanks for the feedback Bham and Chief. I do not doubt the validity of the Corbin, and narrower may actually be better for me. In looking at doing surgery on the foam it looks like what I want to do would leave a lot of slack in the leather thus making it look like crud when done, so slicing and dicing may not be an option here anyway. Plus Harley has the heating element glued to the foam instead of attached to the cover so that poses a problem too. Further inspecting the seat pan and how it sits on the bike I found that the pan is flimsy at best and the section directly under the seating area has no support what so ever. It's floating free above the battery and free to flex. I have already cut a small piece of wood and set it under the seat so that the seat pan is supported when put back in place. If the Atlanta weather cooperates this weekend, I will get a chance to try it out although I'm not hopeful.
Ironically, I have a Sundowner seat on my Deuce and I can go all day on that thing with no tailbone problems. That seat certainly does not feel like it is pitching my pelvis and the foam is definitely harder than the CUSE seat.