Estes Black Brant III, Part 10, Nose Cone Lug Tip

The Estes Black Brant III instructions don't mention clearing the plastic from the nose cone attachment lug.
This tie point is square and the sides aren't that thick.
Normally I'd use a #11 X-Acto blade and cut out the square center.
I didn't want to take the chance of cutting through the sides.
I used a small rat tail diamond file instead.

The tip was spun in the center until the tip broke through.
The file was spun until the file edges met the square sides of the lug.

TIP: A round hole has less chance of breaking through. You aren't cutting out the corners with a sharp knife that might start a tear.
The little bit of plastic left in the corners make the attachment point much stronger.