I've created more robust pivot for window holder https://www.thingiverse.com/thing:3109199. Assemble with:
3x M3 nut
2x M3x16 screw
1x M3x10 screw.
I've uploaded also step file, so you can modify this pivot, as you like.
pivot.stl | 122.5KB | |
wall_bracket.stl | 243.2KB | |
window_pivot.stp | 352.6KB |