Oh! To the head!
My suggestion here is that you be aware of the center of gravity in your hips, and the degree to which your leg is elevated based on the ball and socket joint that connects your hips and your leg. Yeah, your knee might feel closer to your chest. Anyway, if your mind's eye can take "snapshots" of you as you kick, you can correct it. It's principally upstairs. That, and lots of stretching!
Just tryin' ta help...
