Anyone done any work on Magnatone Vibrato's? I am a very junior pedal repair geek, and wanted to take a look at the vibrato in my Magnatone Troubador, because it doesn't work properly (just sounds like a tremelo). I took it in to the shop and the guy said he brought it up to spec, but if he did, it shouldn't sound this way. I'm tired of getting ripped off by repair guys.