This is not blocking our progress right now, but M3 LL FAST IMON is not working, and M3 UR NOISEMON is lower than others by 6 db.

I know that this not the problem of actuation as giving DC offset for each coil moves the optic by roughly the same amount in a correct direction, and VMON works for all coils. There's no reason to believe that there is a big difference in the current/counts between coils.