This project was a doozy and a half.

This is version 6 of the Automail finally realised as a finished cosplay piece. 3D print files are here on my online store.
https://www.artstation.com/marketplace/p/Pm5a7/edward-elric-automail-arm-3d-print-files?utm_source=artstation&utm_medium=referral&utm_campaign=homepage&utm_term=marketplace