I have zero experience with these tillers. Hopefully someone here can educate me. I bought a used 7-1260 Wheel Horse tiller that seemed a good match for a Honda H6522 tractor that I have. It's a 50", perfect width (which is why I bought it), category 1, fits great. The problem is that it won't till. Either the tractor is moving too fast or the tines aren't turning fast enough. The tiller will bury itself to any depth you want while sitting still. As soon as I move the tractor forward, low range low gear (REAL slow), regardless of engine rpm, the tiller walks up to the top of the ground and barely scratches the surface from then on. I even tried adding weights to hold it down. No good. Draft it set on heaviest setting. Anybody got a clue as to what the ****! is going on. Very frustrating. Thank You!!