I have tried it via CI-V on both my 7100 and 7800 and it leaves a lot to be desired. Since this thread is about N1MM it is important to note that the Icom command set (CW via CAT control) is not supported by that software. A COM, LPT, or WinKey is required to send CW. Winkey or Winkey emulator is by far the best way in my opinion and is easily configured in N1MM.