I just changed the 8 tooth drivers out to 7 tooth wahl drivers and slapped the new 1.75" track in there. Its not as easy to get out like the service manual leads you to believe. I had to take bottle jack in there with block of wood to open it up enough to get the bearing retainer in there. Plus taking the shaft out with the track in that close to the heat exchanger is tough, and a real pain with the bigger lugs, but got it in there and took it for a ride. Holy heck. This is a must for any SWT. Taking off punching it, the skis now come up in the air almost cat walking it. That was in fresh snow too. This next trip I will be pulling some wood so I can test it out. The clearance with the 7 tooth drivers and the 1.75" track is about the same as 8 tooth drivers and 1.25" track from the exchanger so it can be done. SO after selling my track and buying drivers, total cost for the swap was 250 bucks.