My friend just upscaled from that seat to https://www.amazon.com/gp/aw/d/B01GFSNQBK/ref=ox_sc_act_image_2?smid=A36MMU92PLSMVI&psc=1.

Used a drill gun and rivet gun - there is a good You tube video https://youtu.be/TbX4MsRG7RA

Hope it helps

I bought a new seat off Amazon. Leader Accessories Black Deluxe... https://www.amazon.com/dp/B01GFSNQBK?ref=ppx_pop_mob_ap_share

Installed right over top off old seat. Works amazing! My back has never felt better.