Thanks are in order for fellow members here!

So, I can't express how much Ian Rogers and Dr_Doggy helped out with with matrix problem, there was ton of messgaes, much of troubleshooting and differences between hardware. In the end, all well, thanks guys! Now matrises aren't that big mystery anymore. It's good thing there are folks willing to help around here!
Thread in question:
https://www.electro-tech-online.com/threads/solved-again-problem-with-matrix-this-time-8x32.146802/

I was dying to step in! But I was watching... This would be a great thread for anyone wanting to do this..

Congrats to Dr Doggy for his perseverance!!

Indeed, doggy had huge stamina to stick along!