So, I'm still evaluating the sensations with my GT500. I took it out yesterday and payed close attention to the body motions and sensations. That "sloppy" feel I've been feeling? I think it might actually be me and the seat! I still think I should probably switch to some constant rate springs, but some better seats might be a transformation. I should've bought those OEM Recaros from @LEXiiON when I had the chance! Other than Recaro, what are some high quality, lightweight aftermarket sport seats out there?