I have been thinking about how to measure the force necessary to pull the lever (double spring). I was very surprised the first time I pulled on the spring, so I wanted to find out just how hard it is.
So, with my trusty digital bathroom scale, and what I remember from my statics class back in 1976 (Statics hasn't changed since then, right?) I figured I could weigh myself holding the lever right before it locks down into the pre-infusion position, and then just weigh myself.
Without sharing the absolute numbers, the difference is 34.5 pounds.
I would be curious what the numbers are for the Strega, Londinium, or other spring loaded lever machines.