Bobbin for pololu gearmotors

Hi everyone, this is some sort of a bobbin i've created and printed to my 1:14 scale RC Crane i'm building at the moment. This is how it works: https://www.youtube.com/watch?v=TjjB38UQ3pE

If You liked it, there are some other videos of this crane on my Youtube channel.

https://www.youtube.com/channel/UCxihaiIMuYIkq3V1vrrnGMQ

Greetings