I just finished printing and assembling this rotating marble run. Challenging but fun, and I learned a lot. I downloaded the 3D model from Bambu Lab’s #Makerworld and ordered the electric parts. After creating this video I lightly sanded some areas where the steel marbles tended to stick and now it works better.
There is an LED strip inside the center spiral. Printed on a Bambu Lab A1 using their filaments. #3Dprinting
Here’s the model:
https://makerworld.com/en/models/928117-360-rotating-marble-run-enclosed-with-lights