This is not exactly lmx motor, but same steel form.
Well, i have designed own digital hall filter for these 'not-so-good' rotors, there possible twice pulse for one commutation. Filter also was tested with MAC motors (new and old), they also have some signal errors. On MAC FOC works good, one my user run with 2kw + temperature limit 120C = 60kmh max
here is motor album:
https://imgur.com/a/Hherr7I
btw lmx should better use new qs motors, black one on photo above. there is 2kW version, but it is really epic and have IPM rotor (goooood flux weakening!) and very nice sine wave and separate hall rotor. I think these can be boosted up to 4x easy