If you try to swing it on every pattern, it may be cheaper for you to learn to play a different line. Try straight up 2nd arrow with more forward roll and less side spin. Also, for oil drenched lanes, I'd look for something that will get itself into a heavy roll and forget skid/flip. Just my $.02, maybe someone with more knowledge will chime in.
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Why, WHY won't the last one just fall?? It's WIGGLING for cryin' out loud!!