I've been using type-a heads with my type-b tanks & cone for the last week with no problems. Very rarely I get slight leakage if I'm chain vaping, but I think that would happen anyway due to the design of the system. I do have one type-b head that I don't use because its LR and always tastes burned, but when I compare it physically to a type-a, I can't see a difference.
That being said, once what I have is worn out, I will be buying a pack of type-b. But for now type-a seems to be doing the job.
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