I have an HX stomp for a jazz band rig and am thinking of getting one for the bass player. He plays an NS designs upright (with active pickups) and a p bass. I'd like for him to be able to leave both basses plugged into the unit at all times, and have two patches, one for each bass. It would be awesome to be able to have one bass plugged into the left input, and the other into the left return to be able to take advantage of the HS Stomp's input selection capability and have each patch have the input programmed in for the correct patch. Does that work in practice, though? Are there any pitfalls and/or a better way to do it? I assume he could also plug one bass into the left input, and the other bass into the right input, but that might cause impedance mismatch and ground loop issues. Thanks!