Tom, I knew this one would get your interest
Nothing can save me now, not even your custom J-box. This was done by somebody that worked for the same company that I do, but isn't there any more. It wasn't ever energized, a church job with volunteer labor doing framing, drywall, etc. has taken over a year. There were ripped up M/C cables,boxes buried under drywall, and the like everywhere.
If the moron that did this had just brought the cables down into the panel (this gutter is absolutely unnecessary) it would be much easier to fix. He stuffed those 3/4s so full that you can't budge the wires. All the stuff in the panel below was Ty-rapped, and he signed his name with felt marker in the can. yet another proud idiot