IMO.... if you could stick the line, all the time, i think you be much better. most the balls you were throwing, and falling over, were high or light. when you stuck it, it came right in the pocket. everyone has their own style of bowling, the short back swing you have, and just dumping it on the lane with lots of revs might work perfect for you. you just have to remember to hit your mark and stick that line. nice videos.
