I had problems with the seat edge placing pressure behind my knees also and I have the power seat. It just wouldn't go low enough. I removed the seat mount pedestal, cut out 1.5" of height and welded it back together. I also peeled back the seat skin and took a bread knife to the foam and cut down the front edge a bit.
Point being, you might want to make sure the power seat is going to give you the relief you think it is before you spend a lot of money on it
When seconds count, the police are only minutes away.
2023 Grand Design 2600RB, 2013 Nissan Platinum Armada tow vehicle, Titusville, FL when not on the road