Server rack filament guide

Base.stl is the piece you bolt with 2x M5 screws to the ceiling of the shelf, the holes for PTFE tubes are 4 mm diameter. Print as oriented. It's designed to guide the filament from up to 13 spools.

Clip-tag.stl is the piece you clip to a PTFE tube to differentiate filament types, also the hole is there to hold the filament tip :)

I recommend getting 3 mm inner diameter PTFE tubes to guide the filament as it doesn't put as much strain on the extruder as the 2 mm ones.