Same idea, this is a handy little thingamajig to will keep a hold of the end of your filament whilst you are doing multicolour prints with a single extruder, only this one is designed to clip onto your Prusa BEAR or other 2020/2040 framed printer, I liked TickTocks remix using the tube rather than groove idea, but also want to mention Clement for the original inspiration (https://www.printables.com/model/204388-your-color-change-buddy-dual-color-print-filament-)
The author remixed this model.