I have two Big B overseas balls in my bag. I use a Smart Zone 1 and a Bionic Zone 2. The Smart Zone is great for normal conditions, Bionic 2 is a Heavy oil ball. It must have head oil to be effective. I bought two of the Bionic Zone 2 at the same time. I only drilled one. You looking to buy one? It's a light #15 or a Heavy #14, depends how you look at it. Great specs pin 2-3 top 2.7
Let me know, make an offer.
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As with all things, this is my opinion. And we all know, opinions are like butt-holes, we all have one.