You dont get much revs when you put your thumb in the house because is conventional drilling most of the time. There is a guy in my men league that averages 220 with one hand and no thumb. Conventional wisdom saying get your thumb in the ball. But if you can get the ball to roll the right way, with good axis migration, and be accurate without losing control of the ball go ahead. with enough practice anything can work. The biggest downside is that is gives you less options in dealing with lane condition changes.
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