It's been a little while since I've been on here.. Anyways the other day my Escort 8500 X50 started showing the dreaded Service Required message. It will work about 1/2 the time and the other half it will not alert to anything. (After several tests with my bushnell and other RADAR sources.) My question is that I have a REV 5 S7 and was wondering if I sent it in would they put a new version (which I hear is slower) or can I tell them that I want to keep my REV? Thanks for your help, again your suggestions really help!!