Incredibly cool idea. Since you only plan on actually using it for one day, may I suggest that you use heavy black card stock instead of sheet metal? There is a standard .050" thick card stock that is regularly CNC laser cut for model rocket fins. The material is relatively cheap, which allows for testing and mistakes(or multiple days if you are so inclined). It can be treated with epoxy for strength and weather protection.
![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
no subject