The technician just installed the pid firmware upgrade on my machine and the rotary pump control dial (as well as the nice zebrawood wooden paddle covers).
The firmware changes to the PID seem to have done the trick - now the grouphead will always reach the exact set temperature rather than lag by a degree as previously before the firmware upgrade. As I understand it the firmware upgrade turns the pid into a true three channel PID whereby each channel is independent of each other.
The control dial for the pump makes it much easier to control the pressure of the preinfusion pump compared to changing the pressure setting with a screwdriver through a port in the back of the machine.
Has any other Nurri owner had these retrofits done to their machines yet?