Looks great! Nice job.
We have a teak mat that came with our used unit, but it rocks back and forth in the shower pan. I tried applying extra layers of shower floor safety tape to the short edges, but it still rocks. May have to get rid of it and try something else, though I don't really want to, because it looks nice. I guess I could try sanding down the long edge that's causing the rocking, but that will probably take a while since I don't really have the right tools. Ah well, 1st world problems.
Rocinante Piccolo is our new-to-us 2016 Interstate Lounge 3500 EXT
(Named for John Steinbeck's camper from "Travels With Charley")