If the pin is that short try this........
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Measure about 1 1/2 inches straight across from the upper middle part of the thumb hole, and put the CG there, then make sure the pin is straight up from that.... just make sure the cg isnt below the thumb....Should produce a smooth, even rolling ball, with a decent flop on the backend, especially if they are fresh...hope it helps
I have an Inferno like that and it lives for backend.....