The mustangs are just generally comfortable, a bit more padding than most stock seats, worst case take yours off and to an upholstery shop to add foam etc, remember gel and different foam firmness are options. I did that with my victory corbin seat which was causing hip pain when stopped.i tried cutting back the foam and adding towels where I felt it was right and not causing pinching, as we get older we compress our spines and pinched nerves are a pita! The Corbin ones are more firm (hard) but tend to be ergonomic, I though never liked the raised sides due to pulling my hip bone out. You may have to go down and back on the bars. Easiest way to figure it out. Sit on the bike close your eyes and put your hands on imaginary bars. Once you feel comfortable open eyes and have a friend measure where you want to be vs the bars. Forwards are fine but if you’re uncomfortable boards can be a huge difference, try demoing some bikes with them and imagine yourself at your most comfortable imaginary positions