mrbowlingnut,
I went through the same thing...tried a few stacked drills (diamond and bomb cores both) and had absolutely no luck whatsoever. I had success with both "Label 1:30" drills, as well as CG out drills.
I decided to give the stacked drill one more try on the Supernova, and it has worked out very well. I cannot explain why this is the only stacked ball I like, but it's true. I decided to go with a label drill on the XP (for more length), and it works very well also.
There is definitely a certain amount of trial and error involved.
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Jon (in Ohio)
CHROME WON'T GET YOU HOME!
F.O.S. Proud Saw user...see profile.