In the first pic I dial in the height. I'm happy to say that this value is quite consistent now, after loads and loads of piccolos. Jigs, solera and skillz.
In the second pic I shape the compensated saddle part. With an expensive Japanese gouge. This is the feature most people mention when scrutinizing my piccolos and I believe it's crucial for intonation.
In the last pic it's more or less done, save for some scraping and maybe sanding.