One thing is, I converted it to electronic ignition. As such, I probably used my "lazy trick" of coring out the center of the magneto, trued it up in the lathe, then just made a simple screw on prop hub to screw on against the magneto center. I then make a collar to hold the magnet for the ignition that goes over that magneto center, and is held with a set screw for timing adjustment.

I like doing this as it is easier than setting up the lathe for a custom taper cut, plus that magneto core is keyed to the crankshaft. This prevents ignition timing changes should the prop hub slip or shift a bit during use.

Unless you run a timing sensor off the camshaft somehow on a four stroke, you will have a wasted, extra spark occurring on the exhaust stroke, but that is not a problem in any way.

AV8TOR