I went with my friend to drill up couple of balls. My friend was drilling a 16lb Storm Trifecta and he wanted to be strong and even. I asked the driller(some1 who i respect a lot) whether or not is a good idea to drill the Trifecta to make it go little bit early and put a increasing flare hole so it will be stronger. But the proshop operator said that its dangerous to do that and he wouldnt risk it, so instead he put a weight hole in the pap.

what i dont really get is, why he said its dangerous to put a weight hole past the pap? can it really put in danger the reaction of the ball?
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The Trifecta is asymmetrical.  You do not have to go past the PAP to increase flare, a couple inches inside will increase flare as well.  I danger with a flare-increasing weight hole past the PAP is #1 that you could roll over the weight hole if the ball flares too much.  Also, combining high-flare balls with high-flare drillings with high-flare weight holes with high rev bowlers can result in entirely too much flare.  When a ball flares, the axis migrates.  If it migrates in a straight line, you get a nice bowtie.  When the ball flares too much, the axis starts to migrates in a "J" like pattern.  This results in a sloppy bowtie where the narrow point moves.  The result is the ball rolling over previous flares.  This is basically simulating carrydown on the bowling ball.  This is not always a bad thing and can actually be beneficial on some conditions.  If you are looking for maximum hook, you need to find the RIGHT amount of flare.  This is usually found when there is about 3/8" between flare rings.
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