Hello Icom Reflector members: I am awaiting the arrival of my broken Icom 551D, the accessory microphone for it is listed as an SM-2. I have a spare SM-6 but it is an 8 pin and the SM-2 is a 4 pin. Can the SM-6 be easily adapted to work on the 551D? If not, anyone have a spare SM-2 available? 73 Warren NØWF