You know I am in love with the big husky can not lie. The 2101 is or may be the best saw I have had my hands on. With my favorite too the 660 of course. To me its almost an even split. Yeah the 2101 is a little heavier than some, but I am going to start running es light bars on all my saws. The weight is not unbearable, and not much more noticeable than my 660. But I have done much thinking and comparison, and got some good ideas from a friend here. And will call on help in the future. You take the first run of 1100's in 1973, and compare to the end 2101 in 1990 close to mine. There was minimal changes, at best. With the same bore, and stroke yet RPM different the 1100-2100 8,500 actually the 2100 is listed at 8,500 and the 1100 at 8000. The bigger change I saw was carb model. And limited or unlimited. So with minimal changes and a long run like that. I will say heck of a saw, but really could be the same, so why the thin ring piston? And what truely governs what you set the rpm on that saw, other than the governor to me. Does not make sense with bore, and stroke and cylinder the same. RPM going from 8k to what mine is 10,500.