Tiger McKee (RIP) posted some stuff on the Tactical Wire a while back, which included stuff with the extractor.
https://www.thetacticalwire.com/feat...0-76a85f80ccaf
https://www.thetacticalwire.com/feat...4-959931fd6dbc
https://www.thetacticalwire.com/feat...f-e15e0cc09a6c
https://www.thetacticalwire.com/feat...8-31d71aced0f8