I sent in an AT Max for a customer. The machine had the symtoms of a bad coil and the external speaker wasn't working. I sent it in the 12th, I got it back today, the 21st. Turn around was 9 days , 2 days were weekend , 4 days were travel.... That is an inhouse figure of 3 days. BTW, they sent a new coil, new coil cover, replaced the speaker, calibrated the detector and put it in a new case. THANK YOU Garrett.. Thanks Richard