Subject says all worked fine when I tested it but after bringing it home and hooking it up for real, I found that it'll start drifting after a few minutes of operation. If you leave it on for a good hour or so and then lock in a station it'll be fine. I thought this was something that happened to tube tuners not SS, but there you have it. If I leave it on "Dynatune" before that first hour or so it'll actually drift so far that it'll mute, I'll have to get up and nudge the dial. Since there are no vents in the case I am assuming it's actually clean inside and that cleaning the tuning cap won't accomplish much. Is there anything I can try at home, or is this a "take it to a pro" kind of thing? thanks for any advice!