Lately I have been messing around with this submission on guard. I have done it to 4 different people 3 white belts and 1 blue belt. So it seems to be decently effective. I get the cross collar grip. From there I need to have the opponents posture broken down. Then with the arm that has the grip I throw my elbow from my side to up in the air. With my other arm I grab my forearm. In this position the arm with the collar grip should be right under their neck and the other arm across the back of their neck. From there I slowly slide the arm on top towards the back of their head while putting downward pressure on their head. I seem to have the best luck with it when I am able to do an arm drag and get them loaded to one side while still having the collar grip because their posture is usually broken down and I can easily get their head down from here. I can push their head back across which usually surprises people because you are giving up the arm drag position right after you get it, but you can catch them off guard. It feels like a kind of collar grip guillotine or something especially when I slide my top arm across his head because you have to lean to the one side like you down when finishing a guillotine properly. So does anyone know what this submission is called and maybe some ways to set it up or improve it?