Alex Moore Page 13 paragraph 3.
Continue to move backwards, draw the RF back to the LF and at the same time lower slowly the left heel to the floor making sure it does not touch the floor untill the RF is level with it. This is similer to what my old teacher a world finalist would call I think, "a splitting of the feet" a must for all good dancers, here are some examples of what she ment. On the third step of the NT waltz, start moving the left toe back before the heal of the RF touches the floor. curving three step, start moving R toe before L heal touches floor. same action for coming out of chair into slip pivot, coming out of slip pivot into a DRS etc. This gives a greater softness and flow to the movement, you could say that one foot is always moving. This needs strong ankles and is one reason that we have exercises to strengthen them.Cheers