The back side of the Moss crank pulley left plenty of room to mount the trigger wheel. My local machine shop turned a shoulder on the pulley and a matching diameter inside the the trigger wheel. This maintained balance, while allowing me to rotate the wheel on the pulley. They also cut a single scribe line to mark a diameter for the mounting screw locations.
Once the trigger wheel was timed to match the crank pickup, I used my drill press to center-drill the 8 screw locations, then tap drilled with a hard stop on the drill bit. This made sure that all 8 holes were identical. I followed up with a hand tap in the drill spindle. A drop of loctite on each screw will lock the wheel in place.