I took the bike to Cincinnati Saturday and came back Sunday. It is 320 miles one way. I stopped for gas once but didn't get off the bike. For me, as far as trips go, it was a short one. I took the Corbin off today and put the Sargent back on. I also took the risers off. I think they may contribute to the sliding forward a bit. I will send the Corbin back for adjustment. I really wish they would have made it a little more like the Sargent. The Corbin is dished too much for me and as we mentioned before, the front is rounded too much causing pain. I will probably try their softer foam. I like a firm saddle, but I was in pain by the time I got home last night.
On my bicycle, I ride with a leather seat, all it is is a formed piece of leather, no padding. I am fine on it all day. I rode form Pittsburgh to Washington DC with no problem on it, the longest day being 70 miles, so a firm seat is no issue. The leather bicycle seat has a bir more flex than the Corbin does for me though, and the weight is on the sit bones, not the soft parts.
I hope they can make this seat comfortable, if not I will stay with the Sargent.