Final clean-up on the edges, trim the control stick openings, debur, and prime.
Don't recommend trying to do this ... just build them right the first time. Trying to locate holes 'in the blind' is a royal pain. Lots of fitting, installing and removing. Checking and double-checking.
It's not as good as it could have been, but it's better than it was from the first builder. This completes the replacement of parts. Everything else is my own fault.
