No issues at all; usually use the 1,000 PTO option, running the engine at about 1450 gives me 540 at the output shaft. I have used the 540 option at 2600 to take care of the road plow windrows when they're unusually large, or especially wet. I run in low range, usually 3rd or 4th gear, but have gone to 2nd in those road plow windrows. Hope this is what you were looking for.
As an aside, the engine HP is in question as the engine data plate lists the HP as 20.9KW, which converts to 28 SAE HP. Had several conversations/ e-mails reference this and it has never been resolved to my satisfaction. Kioti's answer is the old stand-by, "we reserve the right to change specifications without notice"??