I demo'd a new 2001 Lazer 60 with the 25 Kohler today, which the dealer had left in his inventory from last year. I was pleased with the machine but concerned about the lack of the new air filter on this unit. Is this something that I will really miss? If so can this be added to the 01 model? Also while engaging the PTO at about half throttle, the machine almost stalled, and the dealer said the PTO should be engaged at full throttle. Isn't this hard on the clutch? What does Exmark recommend?