3D Printable Stable Pivot Challenge (Building Blocks Crane Part 2)

Thank you for watching. This is the second video in a series where I design a toy crane using a library of 3D printed toy building blocks. These blocks are designed and made for my nieces and nephews but released to the public for your entertainment. Feedback in the comments would be greatly appreciated. More videos on the project to follow.
Constructed of 3D printed blocks, plastic nuts & bolts and MDF planks this toy's purpose is to bring theories of how things work off the page or screen and into a real life. Files and a pamphlet can be found at:

https://www.printables.com/model/673023-rotating-plates-building-blocks-compatible

https://www.printables.com/model/672991-lazy-susan-building-blocks-compatible

https://www.printables.com/@TheOddUncle_984803/models

The safety of the parts or designs cannot be guarantied. I have no design or engineering experience as this is a hobby. Should the files be printed and the project attempted in whole or in part, the public should be aware that there are risks such as choking on parts and sudden failure of parts resulting in injury. Other unknown or foreseeable dangers exist and building this project is not recommended.

I used hardware from McMaster-Carr.
https://www.mcmaster.com/99091A542/