Tried out my Pluto for the first time last night. I had it drilled 6X4.5, pin above bridge. Compared to my neptune drilled 5X4.5, pin above, Pluto gives me about the same length(I was surprised, but this is a very lengthy drilling)but it is not as snappy at the breakpoint. It does have a very continuous back end, but is much more controlable on a fresh shot than my neptune. I think this ball will fit well above the neptune.
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Inertia-Black Widow-Mystic-Pluto-Neptune-Neptune2-Plastic