Welcome!
Couple of things to keep in mind (depending on how familiar you are with the shader) the shader actually generates the entire bezel and crops the screen for you. This makes creating graphics much easier. This was one of the main things HSM wanted to do for artists when he began this.
So these are not traditional overlays, but background images.
I have a repo of graphics I’ve done that you can take a look at to see what layout seems to be ideal with the shader.
If you plan to do RA overlay versions also. I have a source repo for mine that contain a vector generated bezel among other things. They are open source so you are welcome to use anything that might help you along your journey.I look forward to seeing your work!