First thanks for your articles, they helped me to improve kicking for the core.

Now I am still struggling with my stroke, trying to connect it to my core muscles. I sense the point from your videos but your discussion doesn’t solve the problem.

Might it be that the anti-dropped-elbow trick is

bend the elbow slightly while lifting and rotating the upper arm at the shoulder

as written in the h2ouston post http://www.h2oustonswims.org/articles/dreaded_dropped_elbow.html?

Thanks again.