Reflective Rifle-scope Side Camera Mount

Well I was looking for a cheap version of such a thing only to find out that these things are expensive even on ali.
I had a round piece of glass salvaged from a broken torch what was the perfect size as a semi reflector: I decided to give it a go myself.
I took a picture just to see if I had tone the measuring more or less right and the camera would focus on the reticle. No camera holder for the moment so the picture is not centered correctly but the reticle shows up half decent.
The adapter has a dovetail so the camera mount can be custom made for whatever you need.
Once I have everything working right I will make the housing for the glass suitable for a rectangular piece to be salvaged and cut from one of those cheap picture frames. Actually the thinner you can get the better so the second reflection will be indistinguishable from the first one. Best solution would be to find an oversize microscope slide cover because the standard 18x18mm are too small for this job.

Should you want