P.S. Grong -- any chance you could provide a (pictorial Very Happy ) step-by-step on how to lower the p-stat on the Lusso? It would be a very nice addition to the forum, especially for new lever owners who have not done this sort of thing before.
Perhaps, but in the meantime, here is a brief description. Of course, the machine is unplugged when it is being worked on!
First, here is the pressure stat. The slotted screw on the end is what is used to adjust the pressure--counter-clockwise to lower, clockwise to raise. I like to start with adjustments in 10-minute increments, if the screw were a clock dial. After I make an adjustment, I plug in the machine, fire it up, and see what changes were made.
Here is a photo of the Lusso with its case removed. The case is held on by the two outer bolts at the bottom of the machine. The steam valve knob and water valve knob must be removed before the case can be wiggled free. You ou can see the pressure stat, behind some wires, as it is screwed into the side of the boiler.
The case is a little laborious to remove and install. However, if you simply lift off the cup warming tray, you can look down the left side of the boiler and see the pressure state. If you remove the steam valve knob, by first removing its slotted screw and then pulling the knob straight out, you can peak through the hole in the case side and view the pressure stat's slotted adjusting screw. I use a little ratcheting right-angle screwdriver that I bought at the hardware store to reach down inside the machine to make the adjustment. The handle isn't long enough, so I tape it to a pencil to make the handle longer. It takes a little patience to get the slot lined up, but it is not too hard to do with the aid of a flashlight. All in all, a bit quicker than removing and installing the outer case.
The adjustment range of your particular pressure stat should be stamped on its plastic casing.
Best wishes.