I'm in the club now too! Love my little pistol w/ Kak blade brace!
Probably next to the brace, the Apex pistol grip was the best buy. Once it was installed, the planned safeties upgrade became unnecessary.
Trigger spring upgrade was good, but trigger pack weld was done by Navy divers to never be removed! Not bothering to remove it if I ever get another. I'll send it back to CZ for an exchange.
Bought a $20 red dot from Amazon after this review, along with a 1 inch quick detach riser for $10. Works great!
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$13 for some rail covers on amazon and I'm pretty happy with the results.
One disappoint for me, so far, was the duck-billed mag release. It just took one accidental mag drop for me to go back to the original. Probably be good for the range and fun though, because it is fast. Or maybe needs a STRONGER spring. Yeah, that's the ticket.