Eben,
I have found that the 10 inch brad points still wander. Stick with the 6, another trick I use is, I dril from the rear of the plug using a 3/16 bit and fron the nose using a 1/8, gives you a bigger target if you wander slightly from the nose, and the 3/16 doesn't wander mach at all. Actually, I ground my 1/8 bit down to about 4 1/2" and I drill most of the way using the 3/16. Just my $0.02
-Dave
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