AZ-8 (3508), that first flew last year, was the last of the production aircraft to be delivered for training to Ebbing ANG base.
AZ-9 (3509), AZ-10 (3510), AZ-11 (3511) and AZ-12 (3512) all have had their first flights this year and I believe will eventually make their way to Poland in the coming weeks/months.
https://www.f35.com/f35/news-and-fe...irst-Polish-F35-Pilots-Complete-Training.html
That's the way it should be. Only wish this wasn't full block upgrade every 12-15 years. It needs to be 2-3x faster to keep pace with both the threat and what the service wants from a capabilities perspective.