Blindside positioning is a temporary place in time, and the advantage of 2 arms vs. 1 arm will only last a second tops(maybe less) before the opponent will turn, in this time a good WC practitioner can throw out 6 to 8 blows to all sorts of areas on his opponents body, not including combination elbow/lop sao neck pull or headbutt/dbl lop sao to the neck combinations. It will be difficult for the Thai guy or anyone to clinch when they are eating up attacks like that. Another thing to do is to also lead them to the ground while you have blindside positioning, this gives them less opportunities since you have struck them all ready, sweeped them or lead them through the ground with a chin-na tech, and now have mount to continue your strikes.

I've found it was harder to apply the blindside positioning to the WC people as compared to others in different MA, just due to the fact that WC practiticoners like to face square on and have better contact reflexes, so as soon as they realize that I'm trying to flank them they turn faster, that's why you use a lop sao to off balance them to gain superior positioning.

James