Timing Gear Drive

Nah, just some careful patient grinding with a carbide cutter, then a ruby stone to put a nice smooth radius all around. Then I test fit it a few times. Took some patience for sure.
but when I couldnt get a .001 feeler in there I knew it was good.

The way it is out of the box with that little angled bevel...soon as the balancer presses on it, it will eventually score a line into the radius on the crank snout and the balancer and pulley load will help snap the snout off.

With the gear keyed properly onto the crank only by the inside diameter and the back of the gear pressed against the shoulder, any improper stress of the crank snout is eliminated.

I just wanted to throw this out there before it happens to someone. I dont want it to happen to one of the guys who helped me, so I'm just returning the favor.

Dont be afraid to put a nice big round radius on there. Like I said, as long as it's properly keyed to the crank and pressed against the shoulder, you're good! That gear is strong.
Compared to a chain gear these things are some beefy stuff. So dont worry about being super precise, just make sure the radius is clear and you'll never have an issue.

the whole reason that radius is there on the snout is because a sharp 90 degree angle would cause it to snap off.
If there is a gear pressing into the radius and is scores a line, the whole purpose of the radius as a strength measure is eliminated.