Steve,
While it looks like a nice ride, I know the some of the roads and canyons you like to ride, it will it drag the pipes on the ground(not that that bothers you). The problem I see is with the "SEAT to canyon WALL clearance scrape angle" (this is a new caculation, never needed before this bike was built). While this would not be much of a concern for the rider, it sure would be for passengers 6-12. Bike will also need two camera mounts, one facing rear to see passenger faces!