You're welcome!

Fire, I don't doubt that you could do the cuban hip motion. When I was taught it, my problem was moving the my rib cage with it. I couldn't do both at the same time. It's like chewing gum and walking at the same time. What I did was I practiced the two separate for a while until I feel comfortable and loose/relaxed with both then I combine them. For the ribcage isolation, sit in a flat hard chair and firmly grab/hold on to the side of the seat as you perform those lateral rib cage isolation, slowly and stretch as far as you can. After doing 30 of those, start to speed up the tempo. Then change direction and go back and forth, then do a full circle and change direction of the circle. I think your muscles haven't learn to relax yet. This exercise will help them relax. I'd do it for 2-3 minutes at a time each day. Hope this helps.

that exercise was already mentioned, do people read before they post?