Coroplast Lid Edge Support
thingiverse
After all my other coroplast panels were assembled with my designed brackets, I found the lid was sagging. I built an interlocking edge support that could span across the lid and is supporting the drooping edge fairly well. I was limited by print bed size. I printed two of them diagonally at one time and it worked great. I would suggest using a brim to hold those narrow edges down.
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