And I bet you had no trouble with steaming power or quantity of steam from your Classic as I have seen suggested to some CSers about to make this mod. As the Classic is my first espresso machine I was still trying to get my first microfoam, So now I had a new learning curve to get around, it took me about 6 tries after the mod, I just got hot milk. I was starting to think that maybe I should have left well alone and not modded my almost new machine. Now I would not even let that thought enter my head.
I just bleed the wand and hit the steam when the light comes on, off when the light goes off, give jug a couple of taps on bench and then light comes back on and I finish the microfoam. Very fast indeed.
I say to all Classic owners DO IT! I had Bartolis do the mod for me as I should not be let loose with a screwdriver or spanner near any appliance or machine due to past experiences!