Back in the summer I tried placing strategic padding in the stock seat, which helped but still didn’t meet my ideal. Here’s my next iteration:
This is a “back joy” seat cushion, replacing the stock seat. I put some foam under and beside it to better fit and shape it for my back end, and attached it to the back slider for the stock seat. I moved the back track forward to get the position I wanted. I like it. I’ve been for some 6-8 mile paddles and found it to be a huge improvement. My only real concern is how it will hold up to days of use and dampness. I guess I have six months of use to figure that out.