I have the 20HP/52" Fastrack..it cut really well from August on last year, but I have been struggling with it a bit this year. Lots of wet grass here in NJ this spring. I have been forced to double cut my lawn, due to a ton of clippings being left-and its bugging me! I wanted to see if I could possibly increase the engine rpm to help out a bit. Right now wide open no load..engine is turning right around 3475-3500 rpm. Dealer mentioned to me that the engine was safe to up in the neighborhood of 4000. Can I increase it safely? Will it help? I already dumped my gatorblades, and cleaned my deck..looking for other tweaks to help the cause.