I've started to see a lot of new material about this position, Neil Melanson has it as his ideal trapping system in his new book "Mastering Triangle Chokes," Shawn Williams released a DVD calling it the Williams Guard, and it seems to be popping up more in more. I know Eddie Bravo called it the "London," but criticized it because of the pinwheel pass. I've started to really like it, its has all the benefits of the rubber guard without the flexibility needed. Anybody else using it?
https://www.youtube.com/watch?v=kaVklKMW3aw
https://www.youtube.com/watch?v=2CuK2N-F98M
https://www.youtube.com/watch?v=kaVklKMW3aw
https://www.youtube.com/watch?v=2CuK2N-F98M