Calibrate maximum flow rate (stable) for both tubes to determine the maximum speed for both motor. It should also determine the stall threshold if the motor can't make it.
Calibrate minimum flow rate (stable) for both tubes.
Calibrate coarse tube overthrow ratio to determine minimum threshold for coarse motor to stop.
The calibration is inspired from https://www.youtube.com/watch?v=L6s8scDvwtc&ab_channel=AutoTrickler
Steps