N00dlejester: Thanks for posting a video of your approach. I too, have late timing (I had it all my life). In my view, correcting timing errors is one of the most difficult tasks to accomplish, especially if you have been bowling for a long, long time with late timing. Many of the posters have already given you (and others) some excellent suggestions.
"Late timing" can actually increase release leverage at the foul line provided the timing is not excessively late. Late timing can occur during any portion of the approach phase, and for different reasons. For me, I have long arms, which results in a slower swing speed. Although my armswing speed is a tad slower , the leverage created by my long arms (and long legs) generates a lot of ball speed all on their own. I also have no trouble getting the ball into that "pro zone" on the backswing. My late timing occurs much later in my approach. So for me, getting the ball into the swing even earlier, exacerbates my late timing because the earlier you get the ball into the swing, the faster the feet go. For me, my "triggers" for achieving better timing are twofold:
1. I always try to match my footwork speed with the speed of my armswing.
2. As I launch into my last step, I discipline myself to "wait" for the ball to catch up to my slide foot by relying solely on gravity to bring the ball down from the top of the backswing. (In fact, my entire swing cycle is gravity-fed).
Judging from your video, indeed, you have some late timing at release but it does not look too bad. You do start your downswing a bit late, which prevents you from getting into that pro zone on "time". I like Norm Duke's suggestion on this. He said the key is to start the swing phase AS SOON AS your second step compresses on the approach (for a 5-stepper). In other words, as soon as you feel your second step
compressing on the approach, remove your left (support) hand from the ball AT THE SAME TIME, without any delay, and allow the ball to descend into the backswing. This should get you into the pro zone on time . Allow the ball to swing with no muscle (or minimal muscle) throughout the entire approach and remember to wait for the ball to descend on its own power at release.
Good luck to you. You otherwise have a very nice approach!