When I bought my X3, I found another driveshaft and mounted the Avid drivers on it. I figured that with two driveshafts, I would swap the 3" in for the mountains and put the stock track back in for flatland riding. However, in two years, I never bothered to put the stock track back in. I'd rather spend the time riding then track swapping. I promised myself that I wasn't going to change my riding style around home, and if the track got wrecked, so be it. It still looks and works like new.
When you think back, multiple times over the last 20 years, when a new size of track came out (lug height or length), the manufacturers said that you'd really have to take it easy on the trails or flatlands (Be afraid, verrrrry afraid! Ooooohhhhhh!) Every time, that was proven wrong in the long haul and the tracks worked just fine at high speeds on the hardpack. Remember the 2000 700 Ski Doo 151"? Riders were not to exceed 50 mph!
My line of thought was that if the 2.4, 2.5, and 2.6 tracks were fine for extended high speed lake running, was that extra 0.4" going to make it a complete catastrophe? Maybe my track will tear in half tomorrow, but so far, so good. Same with my buddy's T3.
This is why I think that the 3" Axyx is the way to go. If it's more of a powder track than the X3, great! That means I'll get a higher top speed flatlanding it! Bring on the 4" tracks- I'll flatland those, too!