drrev,

I believe I drilled that AMB Particle pin under ring and the cg stacked underneath it with no weight hole.  I remember he had a 4 3/4 inch span.  The ball had a 2.5-3 inch pin but cant remember the top weight.  With his ball speed, I wanted to make sure the ball hooked for him so with the axis tilt he had (which he had medium tilt), I put the pin down to give him help on the longer pattern.  Out of the box (320 grit), the ball was actually too early even with his ball speed.  I sanded up to 2000 abralon and the ball shined.  The ball started to read the lane at about 30 feet and just had a strong continuous arc from there.  It was way stronger than a GP2 and Arsenel Aggressive he possessed.  The GP2 he got used from a friend and it was drilled pin above ring with the cg stacked, which I did not drill.  The Arsenel Aggressive was drilled identical to the AMB and it was, for him, about 10 feet longer than the AMB before it rolled up.  What was great for him, is that with the AMB, he could play right up 10-12 and the oil would hold the line, but could lose it out to 6-7 at the breakpoint and it would roll up into the pocket.  A ball that created area for a guy with 20 mph ball speed off his hand with only about a 275-300 rev rate with a little bit of axis tilt.  I do not remember his exact PAP, but I believe it was in the 4 1/4 - 4 3/8 area.  He was elated to say the least.  The most impressive part of this ball, was that even for as early as it wants to read the lane, it does not sacrifice hitting power unless the heads are fried.
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Steven Vance
Former Pro Shop Operator

If anyone out there is worried about the scores being too high, try duckpin!!

Now DJ, don't go and spoil the fun...
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- Andy

drrev,

I was looking at your profile.  You have some stellar numbers.  I cant imagine having 17 300 games with stuff drilled to roll like crap.  My question, is what types of layouts have given you the best look on the lanes?  Are you struggling with looks in general or just a curiosity with the AMB Part?  

To answer your question, I believe that the VMB was just below the thumb hole on the center line.  What you have to remember is that the more you shift the VMB towards the PAP, the more unstable you make the core.  MB in the track will help to smoothen out the reaction.  The more you shift it towards your PAP, the quicker and more aggressive your reaction will be.  With you having a 3.5 inch PAP, drillings like pin under fingers, either under the bridge or even pin under middle finger for length will probably give you the best looks.  Depending on how aggressive a reaction you want, keep the MB on the center line or within an inch of it and you should be fine.  The only time you should have the MB on the negative side of the ball is if you are looking to control the breakpoint.
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Steven Vance
Former Pro Shop Operator

If anyone out there is worried about the scores being too high, try duckpin!!