I have a spit fire, and it is the best ball iv ever purchased. This ball does not over react off the dry. I use mine on many conditions, i can play down the boards with it and get a good read due to the core design with the block on the bottom, this ball matches up better then the fired up did for me. I have mine laid out 4.5 x 5 no x hole my axis is 5 x 1/2 up my revs are 300 and my speed is 16.50 mph. I bowl on both wood and synthetic lanes, and I can always get a good read out of the spitfire. Defentally worth the price. If you need more info just ask.
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Storm
Specail Agent
Domination
Spit Fire (4.5 x 5)
Jolt Pearl