I recently watched the Tinguinha DVD on the cross guard (one foot on hip, body at angle, one arm hooking one of their legs, other arm controlling sleeve, and my other leg over their shoulder). The setup is awesome and opens up the omoplata and omoplata transitions. I tried it out today against a more advanced and stronger guy and he would just sink both of his elbows tightly against my thighs. I could not do anything with my legs. Every time I tried to hip out and swing for omoplata he just grabbed my leg. At that point, I just tried to transition into spider guard. What do you do when opponent has both of his elbows tight against your thighs in your guard and is prying legs open. It is hard to break posture at that point. Any suggestions?