Ray-Ban leather sunglasses case reinforcement

This can be used as a reinforcement for the weak "leather" clip-in part of the case.
In my case, it was already damaged until the point when the metal clip entirely fell out of the leather material, so I designed it in a way, that the clip needs to slide onto the printed plastic reinforcement.
I printed it from PETG so that it can hopefully endure being in my car during hot summer days, and placed the reinforcement part onto the edge, where the opening is for the leather to slide in. Also, I recommend to enable mouse-ear, so it stays in place (see screenshot).