Im looking to buy a (preferably used) Bearcat 570 or Bearcat 660 non turbo to pull a Mogul Master copy 4x8 drag. Does anyone have experience with either machine for grooming? We have narrow hilly trails. Would love the 4 stroke, but worried about overheating grooming at 5mph. The turbo model probably wont engage the turbo while grooming will it? Any help would be great, thanks