I've seen numerous RCU photos of 21cc Echos on electronic ignition, and many appear to have the two bosses for the magneto cast onto the cylinder. On my two engines the mag mounts to bosses cast into the flywheel housing. Anyone know if this is an old/new thing, or do they curently come both ways depending on application. Does anyone have a picture they could post on how they trimmed the housing to retain the mag mount?

Thanks!