The receiver on a CSA is different, it's slightly thicker, to accommodate being drilled and tapped for a side mount, and has specifically been manufactured to prevent modifications that allow full auto. I don't believe it would be possible to label it a Cz variant, but stupider things have happened (cough cough, SVD=AK variant)
CanadianBaconPancakes They have a 5 year unlimited warranty, couldn't you have sent it to North Sylva? My ejector shifted after a REALLY bad round of Chinese steel cased stuff damaged it, I sent it to NS and sent an email to CSA, got the gun back a month later, works like a charm.
Early guns did have some heat treatment issues in the receiver, but that was resolved.