I will be buying a 3000 and am trying to figure out which port will be used for tuning a screwdriver antenna via an MFJ-104 controller. The MFJ-104 auto tunes based on xcvr data (A-B-C-D etc). In my FT-991A this data is on the 8 pin mini din "TUNER/LIN" and the MFJ-104Y ships with the 8 pin cable. I'm not so sure I can use the 3000 "TUNER" port of the 3000 (8 pin mini din) for the same purpose. Is the DB15 ("LINEAR") port the one to use? If so, there goes my amplifier auto band switching capability (via the DB15). The only thing I heard from MFJ is that the MFJ-104Y ships with the 8 pin/RJ (RJ-8MY2)...Or would I need the RJ-DB9KY to use serial data from the CAT port...which would be okay if the controller sees it. Any of you use the 3000 with such a controller as the 104? Confused? Me too.