Found this video, Auto, you have competition! He does open a few up at the end DualSound, maybe you'll see something that helps.
Thanks for finding the video! I checked it out, but some of the wiring on that Lansay model isn’t the same as mine. On the Technidyne PCB, it’s marked as MCT-700SS, and upon checking online, I found that MCT-700SS is also the model number for the Mechatron MCT-700SS. It got me wondering if they might have the same wiring or PCB layout. I’m still waiting for Autoreverse’s reply as well.
