When you're printing a repair part for the toy helicopter,

3D Printing
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1

When you’re printing a repair part for the toy helicopter, you can also improve its design on the way: https://assadollahi.de/quick-3d-print-of-a-toys-helicopter-rotorblades/

2

Good job, man! What’s your preferred modeling program?

3

@ThantiK right now, it’s Tinkercad. Hope to upgrade to fusion 360 soon.