Word, well, that’s good to know - I appreciate you breaking your silence 
I suppose I’ll keep posting when I have issues in hopes that someone else has experienced the issues I’ve seen. I think what has been confounding is just not knowing what user errors even are I guess. That idea of isolating problems and figuring out what leads to them and how to undo them. Agree that it seems that the cue point exploration has led to more issues than any other approach.
I feel like clearing the tape should sort of serve as a reset and clear out the errors, but when that doesn’t work, what would you suggest to address possible user errors? (If you have any advice at least).
Hope Trent won’t mind my sharing this, but here’s what he said when he responded to my queries last night. Posting it in hopes of sharing knowledge if others experience similar issues:
“The no-lights situation is symptomatic of an SD card that won’t initialize. My experience is that the cards fail quickly if they are going to, so I believe you’ll be fine if things go well for the first few sessions with it. Another (confounding) solution is to swap the SD card between modules. This will often make them both work again, although I cannot for the life of me explain why.”