Mackie C4 and Cubase. How to make the encoders work?

Since you can not explain how you would make the displays working, i can safely say you can not. Even if i can pay you weeks, you will not be able to do this and even if you would have the C4 right on your fingertips.
Let us finish here, because i told you twice, that the MCU protocol in Cubase is a dead end. The C4 is not a supported product for this protocol and the protocol is not open. The displays are controlled sending binary information encapsulated within the MIDI messages, and it's different between the MCU and the C4, which is why we do not see anything on the displays of a C4 and there is no way to change that, as it happens internally of Cubase.
You are somehow possessed by the idea, that you can still do this and you sadly do not believe me or listen to me.

I wanted rather simple things and my approach is fully working, except feedback. Simple things, like we start with just one single encoder. Feedback and the right rules/translator for inc/dec values +-1 on the encoders. Nothing more. Not a gigantum of 4 MCU units and what not.

All the invested time, was for nothing good, because of this useless MCU protocol approach.
Right now, i am rather frustrated and start to regret the purchase.