Alex, The way I read it, M2 is suppose to have separate serials for each station. Same as M/M but only 2 transmitters. See: http://home.woh.rr.com/wpx/WPXRules2003.pdf Gerry VE6LB/VA6XDX ve6lb at rac.ca 403.251.0384 ARRL DXCC Card Checker-Southern VE6 http://www.qsl.net/ve6lb