I'm in the process of trading for K2 nr 663. I have not received the radio yet and it is supposed to be stock. I know there were firmware upgrades as the rig evolved, what firmware should the rig have and what is the procedure to upgrade? What firmware upgrades are available and what do they do to the rig? 72/73, --Rick, KE4IZH FT817/Sierra '93 ST1100 STOC#3210 '01 Blast Chesapeake, Va