Nice work Hawkulous!
Levi_BR was able to extend the B/W DMD to an HDMI screen. He may be using a raspberry pi to accomplish this. It might be worth reaching out to him to see if he can help you with your glitch problem.
Check out the second video posted in this thread.
https://pinside.com/pinball/forum/topic/wizard-of-oz-pinball-apron-screen-mod