Just picked my new to me MX5100HST yesterday and now looking for a bush hog. I was thinking of a 6' cut but my brother in law recommended a 7' because since it sticks out width wise you can get closer to fences and such. I measured the rear tire stance and it is right about 6' . Any thought on this idea? To me a 7' bush hog seems massively heavy and is probably at least 9' long. Also these thing get right up there in price so it would be nice to find a good used one. In looking at used ones (or even new ones for that matter) what should I look for? If it does not have a slip clutch then is that easily added? Are they universal? I saw one at Rural King the other day and I think it about $120. In looking at the new models I see that many manufacturers (at least when looking at the 6'ers) offer different diameter cutting capacities. Some are 1", 2" or 3". I even ran across one that was 4". Crazy. What are the disadvantages to a larger capacity? More expensive and more weight? More HP requirements?