[ChuckElias]

Here's my take on "strong side" or "ball side" officiating in a 2-whistle crew.

When the Lead goes ballside, the Lead continues to officiate his/her primary area of responsibility, whether the ball is in that area or not.

If you go ballside b/c the ball has settled in the opposite post, then you officiate the ball in the post, b/c it's your primary.

If you go ballside b/c the competitive matchup is getting heated on the opposite block, then you officiate that matchup, b/c it's in your primary. Your partner will still have to be on-ball.

In either case, if the ball swings back to your primary on your "normal" side of the court, you have to go back and officiate on-ball in your primary. But I think that's not really a point of confusion in this thread.

Chuck