Cool, I just hadn't even done my test bench CX2 yet, my only real concern is this one has a bunch of old phones, like 5010s and 5020s, and the three sites are spread out quite a bit, it will be a 150 mile drive to the main location, doing the upgrade well they are closed on all 3 sites from there (one onsite, one 40 miles away, one 80 miles in the opposite direction) then drive back to my office that night... I am hoping it is fairly issue free, I am only going onsite because of the speed of their network, and I don't want to have to run back the next day. Upgrading from 4.0 to 4.2 was fairly uneventful if I remember correctly, so I am hoping this one will go smooth.