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.
2019 Newmar Canyon Star 3627 on a 2018 F-53 26K chassis w/6 speed transmission
2017 Jeep Wrangler JKU with Ready Brute tow system w/Currie Tow Plate
Titusville, FL when not on the road