Although I like my B1, I'd recommend trying something more different to go with your B2. Like maybe one of the zirconia/ceramic heads from a different company or something.
As far as I can tell, the B1 has been dropping in the ranks a little bit; as some other options have become available.
It's still great, but I've been finding it a little too open, airflow wise, lately. Using 3mm balls too; It just doesn't really match my preferred style like I thought it did.
Compared to my ceramic Tiodw which has tighter airflow, I find the titanium has some taste that I hadn't noticed much before. When I switched to the ceramic head it was kind of eye opening. Just my
I'm personally gonna wait a little while before I buy any more baller heads cause I feel like innovation is going to continue to happen over the next while.