I have two riding mowers: A 42" and 50: I mow about 2 acres sometimes 2x a week in a park like setting. The ride is bumpy. As I get older, comfort is important and I find that because most of these lawn tractors have very low back supports, the ride is not comfortable, and I get tossed to and fro. I have noticed some of the newer models have higher backs...but still not adequate for me. Has anyone developed or found other seats that would accomodate these riding mowers?