I know from experience with other 3D printed fin-cans that 1/16" thick PLA fins won't hold up very well for flights or landings or even sitting in a hot car. I might try using PETG or a similar polymer as mentioned in https://forums.rocketshoppe.com/sho...416&postcount=6 . I am currently working on building an enclosure for my printers to get better ABS prints that don't split or warp. The 1/16" thick 3D prints of fins I made from ABS are much stronger than the same part made from PLA.

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Bruce S. Levison, NAR #69055