I don't know Chop Choi but we do a similar application at the end of 3rd road of Bung Bu.
I personally have hooked/grabbed the near arm and am hitting accross the collarbone/neck/head depending on how nasty I'm feeling....if I'm real tight in them then I use an elbow into one of those areas.
What I was wondering on the other thread was if they were listing 36 principals or techniques.
Entering the clinch, setting up the throw and the exact tools used to execute a throw will vary by 'style'. But, all throws, irregardless of style, will share the same principles because you are trying to throw another human. The principles are the 'why did he fall down'.
"George never did wake up. And, even all that talking didn't make death any easier...at least not for us. Maybe, in the end, all you can really hope for is that your last thought is a nice one...even if it's just about the taste of a nice cold beer."
"If you find the right balance between desperation and fear you can make people believe anything"
"Is enlightenment even possible? Or, did I drive by it like a missed exit?"
It's simpler than you think.
I could be completely wrong"