I'll chime in with an update. The Proteus + Penelopev4 really does work, but it's not exactly for the faint of heart. You have to be a craftsy type who loves to play with mechnical things. The coils are non-trivial to build and fit in that tiny little space, but it can be done. Expect much rebuilding, regularly. There's no question this device would give me a heart attack, but my wife has now been analog free for one year thanks to it. And she loves her Proteus + Penelopev4, despite the many headaches it has caused. It's especially helpful that she has two of them (yes, she has mine as well, now).