Thanks everybody, this is really helpful. I have a Lane #1 Retro Buzzsaw THS. From what I understand, the BASF Bleeder Coverstock is really Super-Flex as this is when C300 was pouring for the company.
This, along with the medium RG (2.502) and low differential core (0.035), explains why the ball is so super-smooth on THS shots. I have found it takes well to adjustments too, much like PK18.
I'm wondering how it would compare to the Seismic Solaris Blackout, which has a weaker cover and similar stats (although the RG is slightly lower).
Since Charlest just bought a Blackout, maybe he can weigh in!