Here’s a way to do it, called ‘Man In the Middle’ (and is what I did with the SE-02): You use the SE-03X software editor, but instead of connecting it directly to the synth, you connect it to a port that you can monitor via MIDI-Ox which in turn forwards it to the synth, and in turn you connect the synth to another monitorable port which in turns forwars everything to the editor.
If you do this right, the MIDI stream will flow regularly, and you will see the stream pass through the monitor and then you see and reverse engineer all request and replies…
You’ll find some more info here on how I did the SE-02:
Oh, and I read somewhere the SE-3X resonance is not remotely controllable…
EDIT : resonance is okay. It’s the filter mode that is not saveable nor remotely controllable.