Great work on the pilot chest piece! It looks like it's about the right size, perhaps 10% too big. Any good ides on how to attach it to the main chest plate? The reference pictures I have show the pilot piece clipping through the main plate, and it seems like the only attachment points are the two 'clamps' on the sides.
EDIT: I have the pilot attachement printed and half-assembled at 16cm wide, which seems pretty good, since my chest plate came out 17cm wide and is only a bit big. That said, I'm a pretty skinny guy.