[BerntR]

I have a problem with the straight line delivery path. I have never seen it in footage. None of the stroboscope like videos and images out there that show the hand path have anything close to a straight line. Some of them seem to have some variation - larger radius followed by a brief stretch with smaller radius, but never straight. And some of the hand paths seem to have a pretty even curve even among late releasers.

IMO the swing plane does not dictate how late the release can start, but slightly more overtaking can be produced on a steeper plane, especially if there is more PA#2 / less PA#3 involved.

I like to see good connection between pivot and hands during the release interval: A power package structure with enough structural integrity to be powered and driven by the shoulders and the straightening of the right elbow. A right forearm flying wedge that is well preserved, or at least a very quiet right wrist seems to be a good indicator. I do not see this connection fully intact in e.g. Garcia even though he clearly has a very late release. When the angle between the right forearm and the shaft becomes too acute, when there is too much motion in the right wrist, the power package structure gets weaker and more hand action is required.