Estes Bullpup Build Part 4, Plastic Parts Prep

Most every blow-molded nose cone will have a seam.
This one was pretty clean and only needed the ridge sanded off with 400 grit. No filling was required.

The back end lug was closed.





Don't use a knife to remove the lug flash. It's too easy to cut through the lug.
Use a small rat tail file to keep the hole round.
Any rough edges could wear against the tied on shock cord.

I didn't need a razor file to remove the adapter ends.
A few turns with my knife was enough to take them off.
The knife easily stayed in the shoulder grooves while scoring the plastic.

Wrap some 400 grit around an engine casing and sand a more rounded end.