i've still only seen the OLX mold on 1.2 MOLF
team feedback was in favor of the original mold + dome, rather than the X mold. the X mold was tested in S and M, but not Q. that run was like 25 discs too, so no leaky-leaky into general stock.
i believe i've seen them in Q as well. i'll have to double check, but i know for certain they are out there in both the M and S. i'm not as big of a fan of the X mold and i kind of wish they had called the x mold 2.1 instead of 1.2/1.3, etc.