Originally Posted by H2O2

I never learned to trust the lockpin as a timing device and finally gave up on it as a principle tool. I ended up using a mirror and light to "eyeball" position the ridge in the center of the window, then popped the pin in for confirmation. I've since purchased the A-B light unit and now wonder what took me so long.

I'm running @ 13 degrees ATDC -- it sounds like a tractor.