Haven't got a chance to call Belscort yet, but my x50 (older rev 5) is now saying service required sometimes. It isn't all the time, it's happened twice in the past week. A quick reset and it seems to work fine after. I spoke to Escort last week in an attempt to upgrade it with TSR but they said that model was not eligible for upgrade. My question is what does a average repair run cost-wise when an x50 displays "service required" and is it even worth repairing this thing?