Overhead Spool Holder-Rugged

I wanted a spool holder to hold a filament spool above a Bambu Lab A1 Mini. By having the spool above it would mean more desk space. It made me nervous having a kilogram spool directly above the printer so I made it very strong and rugged.
It requires a M4x12 to attach the endcap. Also required are 2 screws or bolts to secure to the holder to the shelf or ceiling. The holder can also be wall mounted.
I added added a short piece of PTFE tubing feeding into the toolhead to assist in aligning the filament.

Prints without supports.