Jewls,
IMHO, your last step and finish position is lacking. Some things are forgiving for all bowlers, feet work, armswing flare, pushaway and even hand/wrist positions, but what separates the Big Dogs happens in the last step and finish position. Like everyone else, I think more attention to steup, position of ball in stance, pushaway directly inline with target line would help tremdously at becomming more consistant. However, to take your game to the next level you need to develop a much better last step and finish position.
After watching your videos several times, I dont necessarily agree with the need for more knee bend although I do agree you are too errect in your finish position. I see your back being straight whereby it should be leaning forward. Your chin should be above the balls of your slide foot when releasing the ball. And clearly in video 3 it is behind the foot because you have your shoulders being bup and back. Obtaining this position will increase your ball speed, increase your rev rate and provide a more stable platform for devliering the bowling ball. (This will make the bowling ball seem lighter to you as well). Additionally, you tend to lean to the left during the release and in video 1 acutally fall off balance in that direction. This again is caused by not being in a good finish position with the shoulders squarely over your feet.
There are some good articles by Bick Ritger at my site that explains this in much more clear fashion. But the jist here is, develop that last step and finish position to become more solid at the line and your power, accuracy and delivery will get much much better.
--------------------
Bowling Tips and Articles at:
www.bowlingknowledge.com IRC: Internet Relay Chat on Dalnet #striketalk. 24x7x365