Thanks for the reply Groba!! I've had a chance to work with the MWXT a bit more and it seems that SOME PARAMETER ADJUSTMENTS MADE USING THE XT's BUTTONS AND KNOBS ARE REFLECTED IN SD SOMETIMES. For example almost all of the knobs in the section labeled ENVELOPES (when set to Filter, Wave 1-4, Wave 5-8 and Free Envelope) will it seems almost in all cases I have seen modify the corresponding parameters in SD's patch editor. The red knob that changes the wavetable will also change accordingly in SD almost always. Also the knob under the section FILTER for Type when adjusted manually will be correspondingly updated on screen in real time. Changes to LFO Speed 2 will be reflected in real time on screen sometimes but not always. Changes to all parameters made using the XT's knobs when not adjusted in real time on SD's patch editor will jump to the current/changed value as soon as I click on it once with the mouse to try to adjust it. I was considering reloading the OS on the XT to see if that would solve these discrepancies. Do you think that this might help? Is it difficult to do? Where can I obtain a copy of OS 2.33? Any tips, suggestions or pointers would be greatly appreciated. Best, AQ