Two loads in and the results are positive: I was surprised it was just as easy to push the 'shot' using the finer screen..I expected more force to be needed. Suppose more holes per inch (hpi?) makes up for it. Happy day. Second surprise: using my current grinder setting (wide open) on the K30 Vario, the 'corn meal' coarse grind is a simple wash off the fine screen, versus the regular (both Crucial and Able versions look identical) which requires a nail brush to get the holes cleared of fines. So a faster wash/cleanup. Happy day.
Yes, there is a flavor difference..ever so slightly less smooth, perhaps a bit of bitter sneaking in, but I'm certain I can adjust my way out of it, it's not *that* pronounced..subtle, and again only after two shots.