Removed my primary cover today and quickly figured out why the bottom bolt was loose - there's a stub of a broken bolt in the threaded hole already.  No wonder the replacement bolt wasn't catching.  Hopefully some Kroil and vise-grips will get that broken stub out.

I mentioned that a tractor mechanic has had his way with my Scout.  The primary was held together by a mish-mash of hex head and square head bolts of wildly varying length.  The photo is of my favorite combination - using a hex nut as  spacer under the square bold head.  On a "proper" Scout, are the primary bolts all hex-head?

I could sure use a photo of the tool you use to remove the magneto gear from inside the cam case.  With the narrow space behind the gear, and the narrow space between the gear and the surrounding casting, I'm having a hell of a time coming up with a solution.

Thanks!

John