So got out today against the same 154 T3 in bottomless pow/sugar snow. Finally got my clutching right with the MDS weights. With smallest screw in tips it would pull 30-33mph track speed and would out pull the T3 up a fairly steep slope, he had to pull out 3/4 way up and I rode over the top. This is pulling 8150rpm on my axys, 125/340 spring, and black/purple secondary spring. Then I pulled all the weight out of the MDS and ran a 120/310 spring. Didn't get out of the whole with as much track speed as running tip weight, but it pulled a lot better track speed once it got going. Was hitting 34-36mph consistently and getting 8250-8350rpm. So the axys climbed even better then. This was at 11K ft. So to sum it up the Axys definitely out pulled the T3 154. T3 had a can on it, but the rider is 30lbs heavier than me. My axys is prob 15lbs heavier than stock with the mods I have on it and tools I carry, so pretty even. I rode his sled too. Still not a fan of the XM handling wise. Will take my Axys or modded 16 Cat any day over it.