From memory there should be a couple of screws that it hits determining the height....I had the same problem when I owned one and just adjusted them until it sat ok. Was a bit a fiddling around from memory.

Correct.

I just checked on the mint AFM I have here.  There are two (2) screws which adjust the height of the bank (when motor is all the way down).
Generally they should not need much more than a tweak to get it right, unless the other part of the plastic mech has self destructed (which is common).