Have you considered jam nuts or prevailing torque lock nuts in certain locations?
Consider using a combination of locking methods: liquid thread locking, a prevailing torque nut that isn't nylon (i.e. deformed thread), and a split lock washer.
Using finer thread helps as well.
-Experiential...
Wanted to expand on BiPolarMoment and 3DDave's ideas.
There's a possibility of creating 2 part numbers, 1 acting as 'raw stock' for the final part:
1. "Part 1A" is burned and bent with the 6061-O plate as the raw stock and
2. "Part 1B" is a derived "Part 1A" but with "1A" as the raw stock...
