zeus,

side weight really don't have much different, what I am trying to do is adding back a flare hole to raise up the bowtie location that my ball now having, my driller checked my ball have 7/8 pos side weight and 3/4 thumb weight, I blamed him that i susposed to have that flare and bowite raising hole with this pin under ring and cg kick out 2 inches and 1" below the center line.

for symmetric ball, the location of Balance hole does matter. it will alter the core for desire reaction.

Nick tested ball don't have deep balance hole that alter the core shape, that is different

yes, i have mentioned the bowite now is just above 1" of the center line, I susposed the core was changed due to my 3rd drill of this ball, the problem of the ball without the x-hole now is not what I expected to have with this layout. So i gave my ball back to my driller and finally know he should have mistake to placed the CG so that he thought the 7/8 pos side weight cannot punch that x-hole.

PS. i am a high track bowler.