How long will it take for the last gear to spin?

What is the gear ratio of this gearbox? How long will it take for the last gear to spin?
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Episode 6 - How long will it take for the last gear to spin?
Episode 5 - Is it possible to spin the last gear?    • Is it possible to spin the last gear?  (1:...  
Episode 4 - Generator:    • Homemade GENERATOR GEARBOX | power almost ...  
Episode 3 - Drill:    • 3d Printed Gearbox + Drill Attempt #1 [Epi...  
Episode 2 - Speed Test:    • 3D Printed Gearbox - Speed Test [Episode 2]  
Episode 1 - How fast can they go?    • 3D Printed Gearbox Series [Episode 1]  

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Follow along as we 3d print different gearboxes, try different gear ratios, explain the science behind these mechanisms.

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