There are some excellent and accurate comments on this message board concerning the closing of the foot in the Modern Waltz. I have no idea which technique book you have. If it is the original book first compiled many years ago. It might be worth pointing out that in those days they had little or no concept of dancing on 4 tracks, nowdays there is a gap ,just enough to get a unrestricted step forewards or backwards.The best advice is to get a tape of a top couple and see for yourself if the feet are jammed together or not. I would just like to give praise to the first top professional teacher and competitor, the late Wally Fryer, king of the scatter chasses, who in the late 40's, taught that the lady needed to be more to the mans right side, and not knee capping each other. Prior to this, a photo from behind the man, if the lady was short, you might just see a little of her forhead, she was almost hidden. Incidently I was there at that time.Wally was my teacher.