Just a fun crank to demonstrate a cool mechanical concept. It's a great desktop conversation piece I designed on Solidworks 2017. Inspired by a 30 year old model at the college made from wood and plastic. See it working on Youtube.... https://www.youtube.com/watch?v=HTr5xX-QYdI
I have included a Solidworks pack-n-go of the assembly and the parts.
It's easy to print multiple colours by pausing the 3D printer, changing the filament colour then resuming the print.