It SHOULD move smoothly when the machine is off Bob- and mine does that too. I differ with you with regards to when first heated up and there is pressure above the piston and the "newness" of the light lubrication from the last rebuild has dissipated.
I have new seals that travel in a nicely honed cylinder that was lubed with Dow 111. It has been 7 months since the first use. I only do single pulls. I use Britta water. I only do the cleaning procedure as stated above - once a year.
I get, as stated, moderate resistance from the piston till water is admitted. I am of the mind that most other Cremina users experience the same modest phenomenon to some degree. Excepting your machine of course..........
Sorry Bob if this seems snarky- Your posts often seem to feel so....... absolute. Of course my burden is that my posts wreak of verbosity among other things.....
Ciao