I recently became owner of a Skywatcher Heritage 130p. Since I live in the city and like to use the telescope from the balcony, I wanted to protect the telescope mirror from stray light.
I looked at some solutions in the relevant forums, but I wasn't completely satisfied with any of them. So I came to the conclusion to design something myself.

My Idea was to be able to clip something on the rails and use black fabric or foam rubber sheets. My first attempt was with 2mm foam rubber sheets and I am happy with it.

You need four of the brackets, and you have to glue them with the foam rubber sheet after printing. A hole must then be cut in the protection at the location of the focuser.

The design is done by OpenScad and should be parameterizable. It is not perfect but it works.

Feel free to adapt or remix the design.

Thanks, Enjoy!

P.S. I am not a native English speaker. If I have used wrong terms anywhere, I would appreciate a hint.