I needed something to mount existing 8mm spool adapters along the same beam for a CR-10S side feed.

Came up with this model screw holes are 4.1mm, and base depth is 20mm.  This was ceiling mounted with #8 pan screws 2" long.  I went back and added tapered screw models (Counter in name).  This was based on an average spool diameter of 200mm, a radius of 120mm was used for clearance.

There is a left and right which will be required, and if the length is very long a center model is recommended.

Printed in PLA, 20%infill, 4 wall, 5 top/bottoms, with tree support touching bed. There was minor cleanup at the support sites to let the rod to slide in the track.