hi Bill, The only reason I'm not using Data USB on the TS590s is simply because I have always just used USB mode. Its always worked fine . If you are going to customise audio equalisation then possibly it would be better to use Data USB and have the seperate settings . I am changing radios shortly to an FTDX3000 (the TS590s has an intermittent problem}. And it is much better to use USB rather than Data on that radio
thanks again for your help Wayne VK4WTN