I recently picked up a lightly used Nightfox. One problem was the lack of saddle adjustment. I don't know how anyone would have thought it was a good idea to make a uni with the nose of the saddle lower then the back with no saddle adjustment. It puts all the rider's weight on the narrow part of the saddle rather then the sit boned. Here is my solution with a slightly less curved saddle and the nose up setting, is quite comfortable now.

I also added a 109mm hole in the 138mm cranks and installed spacer washers on the bearing cap and d-brake adapter.