EDIT: I had to reprint in ABS.
I just wanted to have rain in my shower :)
Each middle piece has 100 mm between center holes.
Holes for wall screws are 25 mm apart but feel free to edit, should be easy with the step files.
Printed in PLA. 146g of it.
I used 0.12 mm layer but I think the screws may work at 0.24 mm.
4 or 5 walls.
10% adaptive cubic infill.
print the screws and the threads horizontally. I also use supports for the threads.
Seems to hold the torque of the shower pretty good and the threads can be tighten with no problem.
The author marked this model as their own original creation.