Multi-Material Road Signs (UK)

# 3D Printable Multi-Colour UK Road Signs

These are minature versions of real UK road signs, dervived from government provided vector graphics samples.

The generate.py Python script will use generate.scad to produce a configurable list of multi-material signs. If you want to add a new sign, modify generate.py and add one to the signs list. Latest sources all on [github](https://github.com/MrBunsy/3DPrintedSigns)

To make rather fetching coasters/cup mats I've scaled the round signs to 9cm diameter, keeping the 4mm thickness, and added felt to the bottom with double sided tape. Printing them in PETG should mean they're fine for hot drinks.

Since I don't own a multi-material printer I've used a variation on a technique I found on a [blog post](http://schlosshan.eu/blog/2019/03/02/prusa-i3-mk3-real-multicolour-prints-without-mmu/) that works with PrusaSlicer and my Prusa Mk3:
- I added a new printer to prusa slicer, and configured it with multiple extruders.
- I then added th