Finally gathered the courage to drill into the seat. Using the pre-existing mounting spots for the rear fender and battery + some rubber stoppers from ACE and the seat is secured fairly well for now.
Just some industrial strength Velcro and some foam and it will be good to go. I’ll be testing out the appliance epoxy method with the tank and seat here someday soon, I’ll post photos of progress, I’ve heard nothing but good things as long as the PREP is done correctly. And yes, it will be all black.