K'nex Tubeless Helix Lift

This is the K'nex Tubeless Helix Lift designed by mathsboy314.

I downloaded a PDF file that contains images and text on how to build this from the Instructables.com web site.

The Link is:

https://www.instructables.com/id/Knex-Tubeless-Helix-Lift/

I built the version with tubes that mathsboy314 talks about in his instructions. My Youtube video of this is as follows:

https://www.youtube.com/watch?v=NaH9YgNhaCo