I am also very interested in this topic.

there is a modification made by amzg (I think) that I extracted from a 32gb image that exists on youtube.

I can not upload this link since I would not comply with the rules of this forum, but I have the theme downloaded.

the only negative thing is that it does not work in 6.0

I want to report an error so that you fix in future updates.

I installed the image for raspberry pi 3 b +

recalbox sends the wrong signal by ctr. the image looks choppy