I have the same set up as you and I pull a groomer with mine. I have noticed the track does rub on the skid plate when the track is forced into a certain attitude but this has happened only a few times and not when I am grooming. The snowmobile trails I groom are relatively flat with some hills. I used a RTV 900 last winter that cannot even compare to the 1100 as far as power,cooling, and quietness in the cab. I checked the drive shaft in mine and see no signs of it rubbing anywhere. I could not be happier with my 1100 on Mattracks. I sent you a PM so maybe we could talk off line and I could tell you what setup I am grooming with and what I did to get a little more power out of it.