Hey Rock,

You are correct in stating that your lift amount causes you to come out of your shot but there are 2 ways to look at it.  If your left leg were more centered to your chest (or even right) at the point of release, you "could" lift harder without falling over.  Another method taught by Del/Mo is to make sure you extend your trailing foot to the opposite side of our body which also helps create more balance and leverage at the point of release.

Take a look at your right foot in the Arsenal vid, it stays pretty much behind you (or in line with your body, stroker position).  Now look at Rev_O or my video and you'll see our trailing leg kicking much further left to help offset the modern day stronger lift effort release.

My analogy (teaching) is if I give you a giant pole to hold up a little cabin that sits on water, where would the pole have to go so the house does not fall into the water?  Dead center, correct?  Well, our upper body becomes that house at the point of release and our left leg acts like the pole.  We'd want to center that leg as much as possible to help create the necessary amount of leverage to allow us to lift accordingly.  

Old school did not teach this because the lift effort was not as strong (full roller release) in comparison to what most players are trying to do today.
Hope this helps some bud.....

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Rick Leong - Ten Pins Pro Shop
Track Intl. - Amateur/Pro Shop Staff  
Vise Inserts Staff
Trackbowling.com