I'm running into an isolation issue with that same power supply on my pedal steel. My Keeley compressor needs isolation. I have Ciosks on all my other boards.
Buddy of mine was engineering sound for some big county show with a bunch of acts. Some kind of variety show. She came to my buddy and asked for the script. Brought it back in about an hour. Just before the show, see monitored back to the sound board to let him know that the Gatlins had switched their mics to the opposite sides of the stage and thought he might need to know that. In an hour, she learned her lines, everyone else's lines as well as the sound engineer and lighting guy's job. He said he has yet to meet anyone as smart as her.
My initial thought was Buddy Holly. He essentially recorded all of those songs in under 2 years. Also, I have always thought Steve Gaines should be on this list. He was really changing Lynyrd Skynyrd in the short time he was with them.
Call Gruhn's. That one dude who found a prewar ended up contacting them . I think his name was Retsevlys from around Auburn, AL. I actually called George Gruhn and talked to him. We then sent a bunch of pictures of the guitar and George called him back. The wait was a LONG time to get it in to Gruhn's shop, but one of his luthiers ended up taking the guitar and working on it in his spare time. The poster paid the guy directly. Only issue is it doesn't get the Gruhn name/warranty with it, but it was the same guy who would have worked on it anyway.
I don't know George but I know someone who knows him very well. I would trust anything he says.