Jim, I have the same system as you (Sho-Bud Super Pro, Nashville 400, Super-Bro). As Larry said, the Super-Bro settings work best at 3 and 7. To get a good dobro sound you have to turn OFF all delay, reverb and any other effects while using the Super-Bro.
On my Super-Bro I mounted a 1/4" female adapter INSIDE the Super-Bro with a grounding switch that will turn off the NV 400 reverb when I turn ON the Super-Bro. Of course you have to use a regular guitar cord that plugs into the rear of the NV 400. Since you have to flip two switches, I mounted the small slide switch on the top right side of the Super-Bro. You have to use the bar that comes with the Bro or try a wooden dowel rod cut same length (and diameter) as steel bar. Then play with the settings on the NV 400. The next trick is (as Larry says) don't use any more pedals than you have to and work on dobro licks. Good luck, Tom[This message was edited by Tom Ward on 18 June 2002 at 03:59 AM.]