After updating the firmware of my doser 2.0 (in order to use them with the KH Director) I noticed that the flow decreased, for example 4.4ml / mn-> 3.9ml / mn without having to modify anything other than the firmware.
I do not know if it is related to the firmware update or if as the said janh001 if it is a problem of stability in calibration on the 2.0 "i see that the calibration is a little bit every time I check. " and which suggested that the 2.1 doser did not only have a new aesthetic appearance but also a better reliability.