just FYI for other M4L users:
I recently discovered this commercial pack which includes 4 M4L devices that add new modulation possibilities.
https://www.ableton.com/en/packs/modulators/
Their Youtube videos show examples of how to use them.
https://www.youtube.com/watch?v=CHFKdKO2q2M
https://www.youtube.com/watch?v=BSRO5P2xHfk
https://www.youtube.com/watch?v=jf6OumgB3mc