Summary

*Credit to Beneto on Printables for developing the Acorn. This is Beneto's Acorn design adapted to fit into the pilot with a 17/32" brass conversion.

You'll need about a 105mm length of 17/32" brass, sleeve it into the barrel and scecure with adhesive. Then slide the whole insert into the pilot and secure with adhesive.

Crazy accurate, all credit to the Acorn.