I have an '06 Cayman S that I track frequently (8+ times per year hopefully), and I have the recaro GT3 seats with the OEM 3 point belts. I guess my main question is are the Schroth harnesses the only way to go for these seats? There are several harnesses for 1/2 to 2/3 the price of the Schroths that look good, particularly the Sparco's. I've also considered getting just one harness to start with, since I don't run in Novice so I don't have an instructor assigned anyway. Thoughts?