Single-piece filament Y-switch for e3d pushfit connectors.

So I thought I'd try dual extrusion with a single nozzle to see how realistic it is and it totally works. I've seen other Y-guides (credited for inspiration), but somehow I didn't like either of those for various reasons and had to design my own, which is, luckily, not so complex.

This is one is a single-piece printing with no support, pretty customizable if needed, but since it uses threads.scad library I didn't make it customizable by customizer (not that it's impossible, but too much hassl