Filament guide

This is just a little extra guide, meant to fit into the back side of the pneumatic fittings we use for bowden tubes.  I made it specifically for this excellent side spool holder, but it should press fit into any guide that exposes the back of the pneumatic fitting.  

Fairly close tolerance, so it may require a little bit of coaxing to fit into the fitting.  I suppose depending on filament it may require a bit of scaling to fit tight too.