It's good to know about the clutch, I haven't thought much about them . I'm going to have to look at mine and work over the ones that aren't working as well as they should. Some of them looked bad when I was fixing the saws but I just grabbed one from the parts box and used it. Most of them are the replaceable rim sprocket type. My first saw had one and I like them so I have changed them as I could find one. All of my big saws have them. I'll have to make a fixture for turning the shoes back true, I'll post pictures when I do this to them. Water weekend so I'm up and going to move some pipes