The pin is 5 1/4 and the pin/cg/mb are all in line.  The top weight is 2.88 but I have very large fingers and drill out a lot of top with the finger holes/Vacu-grips.  I would like to drill it 4 X 4 with a 2 1/2 inch buffer as outlined on page 5 of the Storm PSA drilling guide.  My PAP is 4 7/8 and 5/8 up.

Is this drilling possible with the pin to cg of 5 1/4?  If not, what would be a good drilling?  Very strong arc and continuation,

Thank you,

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Nicanor (Ten On The Deck)