Let's say a certain reader of this article, it doesn't have to be you, has enjoyed a marijuana vape pen once or twice or several hundred times in the past. This reader might justifiably be scared to ...
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Every wanted a mini wind tunnel to check the aerodynamics of scale model cars, drones, or other small objects? Then check out [dannyesp]’s mostly-3D-printed DIY wind tunnel (video, embedded below).