PJ, I have had a mini fastrak 36 15 hp Kohler for about two years now to cut my acre property. It's a great little machine and I have had no mechanical issues with this unit whatsoever. My issue is I like to mulch the grass, and here in South Florida the grass is like a thick weed. I cut weekly but I really have to slow the unit down a lot to get through several thick areas (septic tank), and it does leave a lot of clumps. The motor starts bogging and straining in the thicker areas. I have tried both the Gator blades and wavy blades with no real difference in performance. My question is If I traded this unit up to the Super Duty 36 with the 17 hp Kaw. should I see a significant ability to mulch and get through these thick areas that I am having problems with now. Don't really care to spend another $2,500 with the trade, but willing to do so if I see a benefit.