I was reading some of these old postings about the pros and cons of using MCW. I too have been able to get the TS-480HX working with DM780 using MCW, but as was pointed out in the posting, you loose your CW features. I was using the RigBlaster Pro but changed to the US Interface Navigator as it allows me to use only one USB cable and I have a custom Kenwood cable for the TS-480HX that has plugs on one end for all the Kenwood connections.
I have been unsuccessful in getting DM780 working with the Navigator in CW mode. I'm looking for any input on how to make this work so I can place the Kenwood in CW mode and use the filtering.