Open Source Filament Bank

*Why another Filament Buffering Solution?*
I wanted a solution that met the following requirements:
- Does a decent job of handling retracting filament (duh)
- Fully 3d printable while ideally using a minimal amount of filament
- Retains maximum visibility of filament in the system
- Easy to change filament

The openscad source for this project is available under the MIT license at https://github.com/x0pherl/Filament-Bank

This is a filament buffering system designed for use with the Prusa MMU2s, but should be easily adaptable to suit similar requirements or MMU2S modifications adding additonal filaments.

The original inspiration for this comes from [David Shealey](https://www.thingiverse.com/TNDave/about)'s brilliant design for his [Prusa MMU2 Filament Retract Bank](https://www.thingiverse.com/thing:3373895). His concept of a simple wheel releasing filament into a channel was the first workable buffering system for the MMU2S, as far as I'm concerned. However, this design s