Just spoke with Christ at Escort's support. Got a repair order for my 2 year old 8500 x50. I have a QKL8500 FCC ID number, so if I remember I'm running rev 5. I asked for the newer revision hardware/software. But the reason I'm sending it in is because I keep getting Service required messages. I'm hesitant in opening the thing up to mess with the horn screws when for 60$ you basically get a brand new detector. I figured I'd rather spend a little money then potentially still have problems and not end up picking up a true LEO. I'll be headed to tail of the dragon here in mid-april and I don't wanna to have to go back due to getting a ticket If anyone's every been there, you'll know TSP will hammer you for several things including speeding, crossing double-yellow, etc. I don't want to make a return trip for a court date. Anyhow, my x50 has been a savior in the past, just wanna make sure I can still trust it!