I got the seat installed today on my eXmark LAS28KA524. It bolted right up to the original bolt holes perfectly. There's no issue with the seat operator presence switch since that's built into the seat frame that stayed on the mower after the original seat was removed. It's just a plunger switch that is below the seat frame. I had to sort of make the seat belt work. I installed it in holes that probably weren't intended for a seat belt on the new seat, but it works fine so I can continue to use the ROPS. First impressions are it's very comfortable and smooths out the ride so much better than the original non-suspension seat. I'll get some seat time in it later today and give an update on how well it does on my bumpy ground. Enjoy! The plastic covers on the studs from the factory (these get removed).