I was looking at the added benefits of hanging that extra cutting distance outside the tires. My current 52 sets the tires right inline with the outside of the cutting width. My lawn is spread out along lanes, around buildings, along the top of steep banks and along an old hand cut stone wall, around some dogwoods, around a few old outbuildings so alot of time is spent on perimeter trimming of objects. Once my lawn expansion is done it will probly be close to a full acre of open lawn cutting. So until you ad all the little areas (time consumers) its probly 2.5 acres. I believe the '13 cheetah was offered with my CV740 and a 61, then the next year the two speed came out they split the 61 off to the liquid cooled efi outfit only. I think thats how it went, it would be nice to find someone that has that model.