I shoot all my spares w/ my strike ball. I have the ability (through tons of practice) to throw the most hooking ball on the market dead straight. In one of my leagues, I play 20 at the arrows to the splinter and shoot my 4 and 7 pins straight up the 10 board on the left. Has made my game much more versatile.
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If you blame the lane conditions for your bad scores, then you had better thank them for your good ones!!