Filament Server System Mark II

Since publishing the [Filament Server System](https://www.thingiverse.com/thing:151440) in 2013, I've sought an improved system requiring less printing, fewer loose parts, less assembly, and easier spool changeovers. When I created the pipe-based, wall-mounted [Spool Storage Rack](https://www.thingiverse.com/thing:1551983) last year, I became intrigued by the idea of feeding directly from spools sitting on pipes, but the friction of the spool edges on iron pipes is too great.

As it turns out,