I had Steve Sank review and evaluate my Kora Hermes DAC as well as Conrad Johnson PV-11 preamp, and allowed him to go completely through them, including replacing all or most of the electrolytics and film caps as suggested. The results were stunning. Heads above what it was before with increased musicality, 3D sound stage, warmth, and extension.
Steve has also repaired equipment for me that other electronics people with less skill have broken. He is one of those rare individuals that often knows as much or more than the developers of the original equipment. He can look at stereo equipment (solid state and tube) and spot deficiencies and recommend changes immediately.
He is not just a knowledgeable electronics repairer or modifier. He is a very gifted developer with deep insight into electronics, and a very honest and down to earth individual.