[tongzilla]

Again, the Left Arm is On Plane when the Left Arm Flying Wedge is On Plane. Not before (during Address and Start Up) and not after (during Release and Impact).

In other words, the Left Arm or Left Arm Flying Wedge should theoretically be Turned On Plane between the Startup Swivel and Release Swivel.

Could the left wrist be precisely on plane somewhere during the backstroke or downstroke- for example where the left arm is parallel to the ground on the backstroke or downstroke? - it could but I really wouldn't think it would be worth noting.

I looked at a few down-the-line photos of various pros and noticed that most time, their Left Palm (and hence the Left Arm) is rarely turned directly On Plane between the Startup and Release Swivels. But it's still Turned, just not exactly On Plane, as it theoretically should do.