I have a King KI-256 backup attitude indicator that needs overhaul soon.  I've gotten quotes of anywhere between $2160 to $3560 for the overhaul not including removal/replacement.  Has anyone gotten their unit overhauled lately, who did they use and what was the turn-around time?  Mine has 600 hours on the unit, and 5 years.  I'm based in the Atlanta area. Thanks!