Postman brought in a local DIY system like the commercial flojets,
Dude who setup the system has a nice accumulator to regulate the pressure with the water flow and a pressure on off attached to the pump.
Total setup costed less than $150 shipped and you can adjust the outlet pressure. Initially was 4 bars but lowered with a help of a friend to a reasonable 1.5 bars to the Bianca.
Wished I did this long time ago.