Thanks again for taking the time to walk thru this... it’ll take me a minute to absorb and try any of this. But the mindset I’m taking is as you say — it’s frustrating, but a part of the decision to get into modular to begin with was to learn more about this stuff and not be intimidated by working w electrical components directly. So it’ll be edifying in that respect if nothing else. I have a couple multimeters, but no oscilloscope. Any you recommend? Also, do you have a link to a commercially available PSU you’d recommend for modular? Can’t afford either at the moment, but even if things work out w the Meanwell, once I move into my new house, I plan to get some woodworking tools and build my own custom case later in the year.