Thats a fair fit I think. I don't know a great deal about the G-Force, but I do have a black widow and I'd say that the Secret is quite a bit more than the widow. Yet I'd also figure that the fact that the ball has some pearl should allow the ball to get down lane fairly well.
I'd drill it like the Widow and make sure to kick the cg out enough to have it legal with a bit of side weight. This will allow you to punch a flare increasing or decreasing hole in it if it is too much or too little. Surface changes can work too, but giving yourself some extra versatility is always a plus.
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