Spool wall mount with bowden guide

It's a very simple spool wall mount. Insert a PTFE tube into the hole on the front and push it to the very end, then cut off the excess. Spools glide really good and self-center.

The optional guide is printed in one piece. You need to break the moving part loose after printing. It has 0.25mm space between the stationary and the moving part. Screw in a PTFE connector with 5.5 to 6mm thread.

Make sure to print the guide with a high number of walls to make it sturdy and survive breaking loose the two parts. You might need to fiddle with your print settings to keep the two parts apart from each other so that they don't mold, but close enough that the mechanism doesn't get too wobbly. I'd suggest printing “Outside to Inside”.