Ronnie.
GBS seats are half the price of Cobra 7 seats they are supposed to be similar to and quater the quality, believe me i have sat in both. Try a Cobra 7 seat, padded with lote of suport at the sides.
A mate went over to Belgium in a locost last year and did a track day at Zolder ? said best seats he has ever had, and is in his 50's.
Contact cashy on LCB who sells all types of Cobra seats at big discount,
evolution_uk@btinternet.com