I am aware this is a super ignorant question, but I am truly confused. So the CNTTS "base text" is UBS3. Yet what is available to us as actual texts are UBS4 and UBS5. I get that UBS5 is supposed to be more accurate, but I don't really care about "accuracy" as much as I care about the "base text" regarding the CNTTS, so that if I see that a mss agrees with the "base text" that I can have certainty what that even means.
So is there a way to get ahold of the UBS3?
Thank you for any clarity that anyone is able to provide.