Thanks for the kind words.
Chris,
1. It is built on the factory seat pan and still uses the factory hinges, lock, etc.
2. I don't have any pictures of the build as it was a snap decision, Saturday morning project since the weather didn't look good to ride.
3. I used all new foam in the seat area that I bought from an auto upholsterer in town. It was the most expensive part of the project at $35.00 for an 18"x36"x2" piece. It is a closed cell polyurethane foam that glues easily and is shaped with an electric carving knife (yes like the one you use on a turkey) and a sanding disk on an electric drill.
4. The hump is a build up of foam and has no storage but the LS tail cone has an aluminum tray built up and attached to the sub-frame. Since the seat still hinges it does provide a certain amount of storage (at least enough for a well packed rainsuit).
The guy at the upholstery shop was a wealth of information. I asked and he said yes to hanging around his shop one afternoon and just watching what he does. He specializes in custom cars but the techniques work for any type of seat. Once I saw how he did things I thought, "I can do that." and I guess I found out that I really can. Its not perfect but unless I point out the mistakes I don't think anyone would find them.