Thanks to the excellent write up on Prime (http://www.nsxprime.com/FAQ/DIY/seatmods.htm), I have successfully made the driver's side seat bottom cushion removable. I took me about an hour because I was unable to remove the 4 retaining clip (which BTW must've been incarnated by spirits from the depths of hell); but I am very happy with the results and the headroom I gained have elimanated my desires for a race bucket. Thanks Prime!!