What's a "good banger," is that the same thing as a "short stop"?
Your first rack's shots were played with TOI....very impressive, seems almost like you've been reading the "Aiming Forum" on AZBILLIARDS.... :wink: Are you using CTE PRO I ?
Your left arm flex changes when it doesn't need to at times, however, unless you're playing under pressure this won't be a problem. The "tell tail" signs of someone's speed is from the "feet up".....and since we can't see your feet position relative to the "line of the shot" there's no way to get an accurate read on how effective your upper body angles are.
Paying attention to your left foot position (whether it's open or closed) will help, I'd guess your're too closed and opening up your left foot will open up your body thus your "sight line" slightly. Again, unless you're trying to beat Max Eberle, it really isn't worth the trouble of changing, especially without someone like Hunter Lombardo helping you.