Perhaps we can explore extension vs whip/bat roughly parallel to the lead arm forearm at contact before you teach me your definition of chicken winged?
If I promise to come back to your concerns later can we focus on the question of extension the op asked about?
Yes, I understand do not push. Let the extension happen naturally from the mometum of the swing.You understand I'm saying don't push, right?
OK I look forward to seeing more of her. In any case, my sole point in putting up the teenage boy's swing was to show he was NOT extended at contact and yet a frame later was. The point is, good "extension" does not come from the arm extending/pushing. Good "extension" is a result of the bat whipping forward so powerfully that it PULLS the arms into extension as the arms slow the bat down. Can something similar looking be done with a push? Yes but that would be form at the expense of function. Point is, I'd work on good rotation, connecting that rotation to the bat etc. Do that and "extension" will happen on it's own. I would NOT do any drills to accomplish "extension". Most kids have a push as one of their faults and working on creating extension rather than letting it happen as a result will likely create a push disconnect.
Good "extension" is a result of the bat whipping forward so powerfully that it PULLS the arms into extension as the arms slow the bat down.