My questioning is about footwork relating to the jab-cross combo. When starting this combo, I start with a push off the rear foot as I jab. As the jab is returning and the cross is starting, my rear (right) foot is sliding forward to cover the distance I pushed forward when I started the combo. Is this correct? Since it seems like it's difficult to get 100% power/leverage on the cross since the rear foot is sliding and its not set. Can anybody break down coordinating the feet with the 1-2?? Thanks again guys.