My wife really did not like the stock backrest on our Givi case and our seat was tired and worn. Looking at new seats and backrests was very expensive. The answer was two-fold. First I sent the seat to Spencers' Moto-care. www.greatdaytoride.com. He was able to replace all the insides of my seat for only $90.00 (total of $120.00 with shiping from CA to FL). There is an upolstery shop accross from the local Kawi shop in town. I took the Givi trunk there and the owner added foam all around the stock backrest and recovered it. We took a ride this past weekend (sunny 68 degrees )to test out the mods and were very happy with the results. So instead of the $700 for a new Corbin seat/backrest this only cost a total of $210.00. As soon as I figure out how to post pictures I will post before and after pics, Roman 2001 Concours California