Greetings, I am into my third month owning a Radius E series. I'm 63 years old with a history of back problems. Mower cuts great but after a couple months of using it weekly, 3.5 acres, I'm starting to have back problems and I think the mower is the cause. I suppose I should have gotten the upper series with the nice suspension seat but blame it on my lack of experience. The "E" seemed like the biggest bang for the buck. At any rate I'm looking into upgrading my seat. The full suspension seat is very expensive. They list a 'Suspension Seat upgrade Kit, Kit No. 126-9868" . Which is affordable. Has anyone ever had any experience with the seat upgrade kit? Does it improve the ride enough or should I just be stupid and get the full suspension seat? Thanks in advance.