I just got started doing the key click mod for the Mark-V and just wondered if the NB mod is for the Mark-V as well as the MP. What board does it go on? 73, Mike, W4UM (ex-K4KUZ) w4um at arrl.net South Florida DX Association http://www.qsl.net/k4fk/ Florida Contest Group http://www.floridacontestgroup.org