Oh, I thought you were in the market for one.
While on the topic, how long did you take to feel like it was "broken in" and left it on all the time? I switched back and forth between the stock, gel and Corbin for about 4500 miles getting used to the firmness. I was also swapping out for the gell when the wife was going on a trip with me because the shape back there isn't good for long trips.
Once I got her one of those Butty Buddy chick chairs, I sold the gel and didn't take the Corbin off again. I'm loving the firmness now, especially for long trips ... and Deb LOVES her Butty Buddy.