First there is an article in the last issue of Bowling this Month ( available free on line ) by Rob Mautner addressing this problem.
Second, to be able to use a technique like speed control you need to practice it, Next time you roll some practice games, try throwing one game slower than normal, then one faster, then see if you can get back to normal.
Third, For a lot of strokers there's a mental block when it comes to playing inside. Again you need to practice what you don't like to do because it feels "wrong".
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