The jittering is a little annoying but didn’t prevent it from functioning adequately as a collective. I completed three successful flights in the Cabri with it last night. Currently the magnet is just barely over the sensor when the lever is in the full “up” position (when the spring would be in full compression were it installed) but moves further away from the sensor when the lever is moved down.
I looked through that Reddit thread and didn’t see that there was a concrete solution. I will post back here after further investigation and trial and error with the magnet.