The Stop Lock is an Int'l style variation, considered "open" or "above gold". At the moment, we feature all of the figures of the international syllabus, bronze through gold, but nothing above that yet. Our only variations are in the American style. So we probably won't officially have a Stop Lock until we do a film shoot of Int'l variations.
In the meantime, I'll try to whip up a quick video lesson on my iPad for your reference.
Regards,
Jonathan Atkinson
www.ballroomdancers.com