a little tip to reinforce thin sheet is to fold the edges up creating a lip that's 1 or 2 cm high, where the thin sheet itsef is can be quite floppy it's amasing how much stiffer the structure gets when you fold all 4 edges and they cant flex anymore.
easy cheap and saves weight
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aer·o·dy·nam·ics: the science of passing gass
*i can coast for miles and miles and miles*
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