THUNDERSTRUCK SOLID for sure!!! Knock the shine off, and put the pin down, and it will handle medium-heavy with ease. That ball is 1 of the most versatile pieces I have ever seen. Every storm head MUST have 1 in their bag. Pin up with no hole and the box surface is very long, hard arcing, and continuous, while pin down, with surface and a hole acts like a completely different ball. I could warrant having 2 in the bag.
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Buffalo bowlers are the best all around in the country.
AMF Thruway Lanes Pro Shop employee, and I have no problem saying that I'm Officially a Ball Junkie.