CentriWhirl Whirligig Centrifuge

This is a whirligig centrifuge. I saw this video https://www.youtube.com/watch?v=Qf-D1Upn-KU about a team at Stanford that came up with using a simple little toy as a centrifuge to use in 3rd world countries for disease diagnosis. Hats off to them! I thought I'd give it a "whirl," so I designed this that can be 3D printed, laser cut or cut out of cardboard. It uses zip ties to hold the tubes on (string could maybe work) and some string tied and taped to some pencils.This is designed to work with