Hello, I am new to this forum.
So happen I had created the img for Rock 5A and would like to share with people who are interested to squeeze the performance of the little SBC.
You may find the link to the image here
https://drive.google.com/file/d/1NWPwkIJqqyYyHpVqlo9Y3rZrkCELUqLR/view?usp=sharing