As I thought about it last night, he was on the leading edge of the state of the art in audio. I think he talked to people all around the Mi, Mn area including people at ARC. Back in 1989, I paid him, if I recall correctly, about $400 to upgrade my ARC SP-6b pre-amp. He turned it into a musical instrument. He replaced the RCA jacks with Gold/Teflon type, all the resistors from Carbon to wire wound, Litz wire throughout, new Volume pot, new voltage bias pots for the tubes and all the film capacitors with WonderCaps. I also recall that he added more capacitance in some places. I enjoyed that pre-amp for 14 years and only upgraded so I could try low output MC cartridges. Even his homemade speaker cables made from welding cables were good for the time because the cables were very thick and welders operate at high frequencies. That's what started me down the path making my own mod's and tweaks to my system components through the late 80s and 90s.