<font color="purple"> HST does mean hydrostatic, and it's sometimes easy to miss those things at first, so we'll forgive Bob his transgression, okay?
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John, chalk it up to blindness. . . I simply didn't see it in the original post until after I saw the response. And I think you are right about the CK20 being able to easily handle the tasks. The length of the drive might be asking a lot for a small machine, but if it is to be done twice a year that shouldn't overwhelm the tractor. I switched from a RFM to a MMM on my New Holland this summer. I believe both types of mowers have advantages, if I was doing a lot of FEL or grading work, I'd much prefer the RFM. However, I've really gotten to like the MMM lately, and since I have more than one tractor available, I tend NOT to use the NH for things like pulling a box blade because for that, I believe bigger is better and have a blade that is too large for that machine.
Regarding mowing . . . A high quality RFM will easily give as good a cut as a MMM. I prefer BEFCO finish mowers, they are probably the best, or certainly one of the best of the premium brand mowers with features that are not even available on brands like First Choice, Howse, King Kutter and the other discount brands. My take on mowers, for people who use their tractors for mowing, is that if you add up the hours you spend mowing and compare that to the hours you use ALL other implements COMBINED, typically what you find is that your mower deck will get twice as many hours of work as everything else. Because of that it makes sense to buy a quality brand. When I traded my 60" 10+ year old Befco deck in, I got a heck of a trade in price, and the dealer put it on his lot for $850 . . . which is not a heck of a lot cheaper than a brand new discount brand (many brand new discount 60" RFM decks run from $950 to $1295). So that says a lot about the quality of the brand and the durability of the brand. Unfortunately Befco is expensive so many people don't consider them. But if a lower price brand lasts 5 to 7 years, and a Befco is still going strong at 10 to 15 years, the price up front would actually be cheaper. I only got rid of mine because I needed space in my garage and switching to a MMM provided that.