Ok, not to worry, "lead with your center" has been drilled into me by my wcs dance instructor. The concept, not the necessarily the term. And thanks to kayak, a eureka! moment for me; "center" as in "center of gravity", "lead" as in firm frame, no noodle arms, smooth pressure toward and away from the follow, without jerking, yanking, pushing, or pulling. Term and concept are now embedded in the noggin. And to be fair, I'm sure the instructer used the term while demostrating the concept (likely multiple times), it just didn't sink in. Actual impedmentation of the lead is problematic for us beginners; it's not rigid, it's not even constant. Witness the simple left side pass with a (leader's) left arm connection (as taught by my instructer); lead with your center as leader steps back and out of the slot, connecting arm relaxs and falls as follow passes, frame and tension restored in connecting arm as follow continues to end of slot. Any "leading" by the beginner leader in the middle of the pass is incorrect, "lead" at the start, "lead" at the finish. Simple, but everyone of us leads (well, some of us, and by some I mean me) will start by holding the arm up at elbow height the entire pattern because we are "leading". Getting back to Me's problem with WCS; so to get her to wait, back to me, shake her tush, five pivots, etc..., how do I do that one, there a secret handshake or something?