Yes, with 50 mOhms I calculate it to 3.2A, perfect.
I would not recommend running the motor until you have replaced the resistors. Also, note that you should only replace these resistors (not the middle one):
You also need to change a bunch of parameters due to low current and high resistance of your motor. The following are a good place to start, but you will need to tune it:
.vel_gain = 1.0f / 10000.0f, // [A/(counts/s)]
.vel_integrator_gain = 0.0f / 10000.0f, // [A/(counts/s * s)]
.calibration_current = 0.5f, // [A]
.current_control.current_lim = 0.6f, // [A]
There is also a section of code around line 800 in low_level.c that looks like this:
if (!measure_phase_resistance(motor, motor->calibration_current, 1.0f))
if (!measure_phase_inductance(motor, -1.0f, 1.0f))
You should change the 3 places that say 1.0f to 5.0f (and -5.0f where it says -1.0f).