Does anyone know if the on/off pressure can be adjusted on a flojet pump? Since my machine is pre-infused via direct line pressure I was hoping that I might be able to find a way to adjust this up or down to fine-tune my shots. I have all the necessary hardware to direct plumb into the water source from the house with a regulator and gauge, but I like to custom blend my water with the right minerals so I'd like to be able to continue running it off the jug. I know it would probably void the warranty but does anyone know if this is possible? I'd like to be able to go up to maybe 3-4 bars instead of the 2-2 1/2 it's set at now.