There is not really an amount of money (especially $900.00) you can put on the difference between an AOS with a 35 Cat and one with the 28. The 35 will make you so much more money it would be hard to figure. Time is money, and the 35 will run circles around the 28 in medium to heavy cutting. Does the ride not just blow your mind comparing it to any ZTR you have ever owned or operated. Name all the ones you have owned or operated and give me a comparison in ride, speed, cut and productivity?