The gauge is stuck at 7 Bar. But otherwise moves when I use it. You think that is its new or current "0"? If all I have to do is move the needle, then fine. I just assumed something would be stuck inside the mechanics somewhere. I can't get the damn face off the gauge

Adjusting the grinder while it is running avoids going too far compressing grinds still sticking to the burrs and stalling the motor. Your grinder dial may not be calibrated to a burr chirping zero point. With clean, running burrs you should be able to readjust your dial to zero at the chirp

Actually, yea that would make much more sense, where the water inlet supplies water to both the boiler and to the hydraulic circuit and the extra fitting on the side is the drain. This is how my Cosmo hydraulic is plumbed too. I was thinking the tube going into the boiler at the 3-way valve was always open and forgot