There are actually a large number of ways that you can improve your guide scope. Everything in this video relates to improving the hardware. I know most people doing videos like this just give software tips.
Here is a link to my STL so you can print the shade.
https://grabcad.com/library/sv-bony-30mm-f4-guide-scope-shade-1
If you do not have access to a 3D printer I am going to see if I can distribute them myself.