Waist-level finder for Canon FD NEW F-1

This is my first self-made model, a waist-level finder for a Canon New F-1. It is meant to be inserted into the rails from behind like a real viewfinder.

I printed the model with an Anycubic i3 Mega S with 0.2mm layer height and a 0.4mm standard noozle. I used support The material is simple black PLA. I have activated support printing to hold the 90 degree overhang.