The seat on my S40 is comfortable but I often want to scoot back just 2 or 3 more inches & that hump is there. I'm thinking of cutting off the part of the seat pan behind the 2 bolts & somehow giving it a flat profile straight back to the fender. Then I'd recover it & move the rectifier box somewhere else. Anyone tried this? If it's not feasible I may do the seat lift that I've found in your posts. (thanks!)