I was reading this thread with interest, as this seemed like a reasonable (if not perfect) solution to my needs. Then I got to the part about it not fitting on a 2020...
So, while you are in the midst of redesigning, perhaps now is the time to consider if a single-compressor ARB model might be added to the tray somehow.
Then it would be perfect
Even without that addition, it's looking like this is what I would want for my 2020.
Thanks for creating, and now redesigning this.