1st-line wrote:With the full closure of the Bianca paddle before engaging the pump, you can bypass the pumps preinfusion by waiting for the pump pressure to get to 9 bar or higher, then open the paddle so there is full pressure exerted at the start of the espresso shot. Just some food for thought.
I have used it both ways and I would agree with that time lag before seeing the pressure start to ramp up at the puck (with the valve open aprox 1/2 turn from closed). I am not completely satisfied with the flow rate in this scenario though (5 ml/s last time I measured). Okccraft posted a pic of his handle modified to allow for a full 360* rotation. BIANCA-fy your E61 Grouphead
I will be making this improvement on mine.