I have the Attak. If I were in your shoes I'd put the 144 on. As long as you don't put a track on with lugs over 1 1/4 tall I would think that would be just fine. I think longer lugs, all you would do is tear up the trails too much. The 144 may be just the ticket to make these sleds run in the deeper snow. My attak does well until you get into 2 ft or deeper, then it shows that it is not the best crossover sled. Other than that, its the best out there as far as I am concerned.