hole kit (marble kit 2.0)

It is necessary to have at least the "marble kit 2.0". All kits are in this collection:
https://www.thingiverse.com/sergiode21/collections/marble-kit-20

today I bring you one of the most complex pieces that I have made so far. It is a hole where before entering the hole it begins to spin.

I have had to experiment and create different versions so that it works well and even so, if it goes very fast it can go out on one side (which can also be used to make it interesting).

I hope you like this piece.