Pin placement is more important than top and side weights.  The proshop must know your PAP (positive axis point).  If they don't know how to find it, look elsewhere.  Placing the pin at 3 3/8" from the PAP give the most flare and hook (in general).  It places the core at it's most unstable position, so it may be harder to control.  Putting the pin further away (4-5") will give more length and potential backend.  Placing the pin closer (1-2") will give earlier roll and a smoother backend.  If you track high, put the pin over the line between your ring finger and your PAP so you don't flare over your holes.  Also placing the pin high (over the ring finger for example) will give more length than a lower position.

The center of gravity (CG) is the secondary consideration.  Stacked below the pin will give flip.  Moving it to the right will give earlier roll and more midlane.  Moving it to the left will give length and arc.

The cover is probably more important than the drilling.  If it's not right, the drilling won't matter.  Too dull it will roll out and hit like a marshmallow.  Too shiny and it will never grab the lane.
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