The engine hook notch and launch lug hole will be on opposite sides of the body tube.
Draw a pencil center line across the centering ring.
Using a rotary punch, set it on the largest hole or 3/16" diameter.
TIP: A 3/16" hole will fit a 1/8" launch lug perfectly.
I also used the rotary punch to make a round engine hook notch on the other side.
It took two punches, one on top of the other, to make a complete notch.
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