Don Dennis fitted both Skydex flooring AND Ullman seating in Thalassa
, his Redbay 8.4 Expedition. He did a writeup here - Linky
Might I ask what kind of footwear you favour while boating? I ask because I used to wear waterproof boots and suffered from tingling feet and sore knees after a long day cruising. I've swapped to a well sealed pair of old hiking boots and the difference is amazing. As a zero cost option, I like it!