Not sure I understand this. Are you describing using both outputs on the DS-5? I have always assumed that if you employ the treble out, it separates the two signals and the mono/bass out losses the treble (bridge PU) signal and becomes just a bass (neck PU) output. It seems to me, for your idea to work, the mono/bass output would have to function as a mono (both PUs) output regardless of whether anything is plugged into the treble output. Am I missing something?
Bill, tgo