Not Ranked
Mine is a dial-back (but digital). A Snap-On I bought from a mechanic friend who changed careers. Setting the dial-back to say 38, and then quickly revving the enigne to see if TDC lines up and then stop, seems easier on the "unloaded" engine than holding it at high rpms to read the damper lines (TDC additionlly marked with a bright paint blotch). Having a tach on it is a nice feature too.
I really like it, but it would be nice to be able to check the calibration somehow. So far, my static max advance seems to match the light with engine running. My old light went to another friend, so no double checking the basic function.
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