It sounds like more of too much finger weight rather than top weight. With the pin and cg location, the ball is going to go real long before it flips. If you wanted to try something before plugging the ball and redrilling it, I would try and drill the finger holes deeper to take out some of the finger weight. That may be enough to give you the reaction you are looking for without having to plug the ball, good luck!!
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MainePBA
"Power tends to corrupt; absolute power corrupts absolutely." Lord Acton