Yes Sir Russell,I had posted some comments back in April 06 on this very topic of hand signals,along with other signals as well.Below is a direct quote regarding these signals:
"Matter of fact I wrote an illustrated training routine for a couple where the femsub was required to learn about 16 different poses,much like the Gorean Kajira poses.This was part of a penalty for her.Not only did she have to learn all these she also had to learn the corresponding signals for each which covered voice,hand,light and an artificial launguage command.The Dom told me he could put her through a very gruelling routine of her having to execute all positions at a fast pace using a variety of these signals.Other times he would have her hold certain positions,which were pure agony for her.Apparently this mental and physical training worked as she mannaged to stay of of trouble after several of these sessions."