3D printing is great, but things can go wrong. Sometimes, if your settings are wrong, or if the filament doesn't cooperate, or if the model is just fussy, you can end up with a plate of silent whistles. To ensure some amount of QA is done, make sure to test at least one whistle from each plate you produce.

TODO

If you don't have any mechanical way to test whistles, you can do so the “old fashioned” way. Just give one a toot! After you confirm the whistle makes noise THROW IT AWAY, no one wants a pre-used whistle.