@Galaxy, I was thinking the 'non pin' was a TimeSert. When I first blew a plug with my old heads, I had a insert that looked sort of like a heli-coil, but had 'teeth' around the top to lock the insert in. I was told back then that was a TimeSert so that is why I thought Lock-N-Stitch was something entirely different. This time, I know for certain I have the cross pin type of insert. If I Didn't have TimeSert back then, what is it I had?