In order to set the magneto timing I'll need the ring gear and starter installed. I don't think I'll need access to anything else back behind there, so it's time to bolt the starter on for good:
Ring terminal tightened and bolts torqued, with lockwashers:
Flywheel and ring gear temporarily installed:
The flywheel has timing marks stamped on it, which you line up with that little hole on the starter in the center of the photo. Simpler than using a protractor or degree wheel.