I don't know what conditions you harvest in but we farm some pretty severe ground and require hillside machines. Because of the conditions and the added weight we have the hydro pressure set at about 8,000 psi stall pressure which makes a huge difference in how they pull and slip much less than the stock setting. The other thing is have the pump on the engine turned up 1 turn on the screw. With these settings my 2388 in 3rd gear with the parking break on will not pull the motor down more than 150 rpms during a stall test. Most of the time I am cutting with rpms running at 2400, 100 below max, except climbing a steep hill. My machine will acctually not feed as fast as it has power to handle the material. Even on a level land machine I can't imagine why someone wouldn't want to have the extra power just in case, and for the extra productivity. When ordering the Kile flights you might want to order an extra set of wear bars for the front so you have them. We ran the one in my 2388 for 3 seasons, approximatly 500 seperater hours. We then replaced the wear bars, and powder hardfaced all the leading edges and places that were showing any wear. I believe they have gone to a harder chrome allow wear bar now for longer life. With these repairs to my machine along with a new chromed cone and vanes, new extended wear cage and SS vanes, I will not worry about pulling the rotor again for at least 3 seasons. Good luck with your new flights, you will love them and hopefully have a proporus harvest.