First, I have a new (40hrs) scag wildcat. I have one account that is about 5 acres of up and down hills. Nothing so steep that you have trouble staying on, but just non stop rolling hills. The mower does not seem to pull aswell after about 30 minutes to an hour of mowing. I reached back to feel the hyro lines going into and out of the cooler. They seem to be hot, but not to the point of not being able to touch them. Has anyone ever put an oil temp gauge on there hydro system???? Or added a dc cooliming fan to the oil cooler. Second I have been thinking about putting double on my mower, was wondering if anyone had ever used a different length blade on top. Just thought that having more of the area from the spindle out having a cutting edge may work. It may also not rob quite as much hp.