Well, the Corbin seat arrived, and I now have it on the bike. I have posted pictures below. First a few comments. The materials and workmanship are up to the usual Corbin standard, which is very high. Also, I was concerned that the seat might interfere with the operation of the side cases. As can be seen from the pics, there is absolutely no problem.
There are two concerns that I have about the seat. First, as you can see from the picture of the bottom of the seat, the passenger seat is not connected to the fender. It simply rides on rubber bumpers. I am not happy with this.
My second concern is the the steep back on the seat effectively shortens the seating area. Since I have a rather larger rear end, I am afraid that it may push be too far forward.
Finally, all that I have to do now is get a few hundred miles on the seat and then I will report back. (Corbins do take some break in to get really comfortable, but it should be way better than the stock seat right out of the box.) Oh yes, I almost forgot, I had to remove the lift that I had on the front of the stock seat to install the Corbin.
Here are the pics.
The seat out of the box
The bottom of the seat
The seat mounted with the side cases.