Umbrella Holder

Someone mentioned that large umbrellas are hard to carry, so I made a holder.
It have a Picatinny Rail (20mm rail) and a Modular Lock (M-LOK), but it is not particularly meaningful.
It might be somewhat useful to add a light or a hanging cord.

1.  The inside diameter is 45mm.  
2.  The inside diameter is 41mm.  (Update!)

About printing
Support material needs to be set.
Please refer to the attached photo for printing direction.
For material, I recommend PETG or higher for long-term use.
Other than that, standard conditions should be fine. 

0.4 Nozzle, height 0.2 mm, wall 2 min, width 0.4 mm min, infill 15% min .
 

UPDATE 2023.03.09
Added 41mm inner diameter version.
Removed version with tapered inner surface.
Re-examined print orientation and support placement.
Added g-code files.

Needless to say, please use it on a fine day.
Use in serious situations can lead to misunderstandings and injuries.