Hey, thanks for the welcome!
The biggest issue is that my monitor is dark and makes it impossible to calibrate the light guns. I've tried adjusting all the pots to brighten the screen, but even at max brightness it's not good enough and just washes everything out. I've done a cap kit on the monitor but that didn't help anything. Haven't tried replacing the flyback yet, and I probably wouldn't on my own. Hence why I'm looking for a tech to lend a hand, tools, and knowledge.
I also have an issue with sound cutting out during certain parts of the attract sequence, but that's not an immediate concern, as it doesn't interfere with gameplay.