the 20% was just an example based off of Scags post. Who actually knows the answer.We can all crunch numbers and come up with a guess but most units ,other the Takeuchi are so new too the market that it is hard too pin it down.There are 10 rollers on my machine and 2 sprockets. Coming from a reputable source the rollers and sprockets will last through 3 and sometimes 4 sets of tracks. I have a friend who has over 2000 hours on his tracks and 3000 on the machine. Most will only get around 1000 to 1500 hours. I will guess that around 4500 hours would be considered tops for most machines(lifespan on the Machine). Take 3 sets of tracks 10k ,a complete set of rollers and sprockets 2000,and the labor too install them. Just say 14k. Now divide that by 4500 hours. If it was 10 dollars an hour extra then that would mean it would cost 45 k more during it's life too maintain it.At 15 an hour that would mean 67500.00 dollars more too maintain it. I just do not see it. I had several people tell me the same thing and I asked them too show me on paper.Still waiting. The tracks,rollers and sprockets are pretty much the only difference between my CTL and a wheeled machine. Maybe if I would park my Tractor and use the Skid more I could get there sooner. I agree.But as in any Business decision base it on facts. That is all I am saying. KSSS I do very much respect your opinion as well as Scags and most of the other guys here. I asked alot of these same questions when I was purchasing my machine and early on I got the same exact answers. I stepped back,talk too several different operators(in my area) and realized that the Tracked machine best fit my scenario. 40 hours of my Machine time so far is work that I do not think I could have accomplished without a CTL.Thats 20% of my hours. But I do have a Tractor too fill in for the rare times when I need tires and I have both machines too take too jobs. If I had too do it with only a skid steer then maybe my opinion would be different.