Mirror centre finder Celestron 130EQ

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5389546.

Designed this to find the center of my Mirror on my Celestron Telescope. This is useful for putting on a sticker for Collimation. I made this in Design Spark mechanical a free CAD program and have attached the design File in case anyone wants to edit it.