[Experimental] Freestanding spool attachment, cut in half

This is a minor remix of the original, I've cut it in half and added connectors that should splice it together well enough.

I've tried to print the original five times, every time the filament started peeling off the printbed - no doubt it wasn't aligned properly enough.

So, instead of finetuning the printer, like any sensible person would have done, I decided to change the design, so it wouldn't need as much space, hopefully printing better :-D

Good news: it did. The prototype is curre