Hi: thanxs, so you say that should I implement some way to change the Mfr Id on the fly or give the chance to change this ID to the user in the event it conflicts with other manufacturer gear? What do you think about a "SysEx Lock" dipswitch used to ignore all sysex incoming data? This can be useful for a knob controller since it needs programming only when you need to assign some knob to a controller or a channel, or to meka a preset. Then you can have a preset bank and switch between them on the fly. Do you think it´s feasible for a knob controller?