Larry. The close up images
Larry. The close up images you asked for.
Disclaimer, it's oblivious I'm not a mechanical engineer, use at your own risk and discretion.
Below is the seat pan spacer. The bottom seat radius for my CF seat is not the same radius as the Silvio's, so I built a spacer to fill in the void, so my seat bottom will have support and rest on something solid.
At the back I cut up a small plastic (ultra high molecular polyethylene) block. I mounted it to the frame using the new 3m Scotch Daul Lock (it's like Velcro, but stronger), and then screwed and bolted a piece of aluminum 1/8" x 2" flat to the bike and block.
And screwed the seat to the plastic block with machine screws.
The front mounting screws.
Bolted to Silvio's existing front 2-hole bracket using nylon and rubber spacers.