I've only seen this drilling a few times, but actually tried it in a ball yesterday....WOW.  Here is the map for it

2-3 inch pin only!
2 1/2-3 1/2 oz topweight only(any more will be too hard to get back into balance
*= Pin
o= C.G
( )= 1 inch weighthole drilled 3 inches deep
x= axis point

--*--
--O-O---( )
-------o-------x
--------
---0---

There should be a 45 degree line through the pin, middle finger hole, and C.G.
Bring the Weighthole up near the fingers and 2 inches in from the VAL to increase flare and drill out the topweight.  This gives you a great read in the lanes and as soon as this sucker touches dry it looks like someone kicked it.  Great for opening up the lane on the house shot or to square up and cut through carrydown.
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-D. Marshall
ScratchBowling.com Shirt Staff 2003-2004


Edited on 12/19/2003 11:11 AM

Edited on 12/19/2003 11:12 AM

I forgot to mention it's not for high trackers.  More for people who come around it and track at least 1 inch off of the thumb.  Also that should be a 45 degree line through the pin, ring finger and C.G.  The pin will end up moreso over the bridge instead of the middle finger.  I just couldn't get my picture to work out the way I get my ball out.
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-D. Marshall
ScratchBowling.com Shirt Staff 2003-2004

I just redrilled a Vicious like this, the first ball I've had like it and I love the drilling.  The only difference is the pin is over the ring finger for me.  My PAP is 5 1/4 x 0 to 1/4 up and I'm a high tracker.  I haven't had any problems hitting any holes and really love the reaction now.  With a stacked leverage the ball was way over under, now it reads the lane and has the backend I thought this ball should have.  The drilling does like to jump if you get it to the dry too soon, especially later in the set.  I look forward to getting more equipment drilled like this in the future.