Thanks, that is helpful to understand what you are trying to do. There are multiple ways to go about this. How I would do it is set up a picker with the preset subtype.
Make the picker a super control of all the drawbars you would like to control
Then make a Store preset button and a recall preset button.
Under Other relationships on the relationships menu of your preset picker set store preset and recall presets to these buttons.
Now you have a place to save presets on MD
Next create a button or knob that responds to the messages set to MD from your module. Make this button the super control of the preset picker. If you have multiple buttons for changing multiple presets then make multiple buttons in MIDI Designer each correlating to the midi message on the module you want to send to change the preset picker.
I hope this is a start, let me know if you need more clarification. Best,
Mitch