Really interested in developing my straight footlock game (as a blue belt, it's the only leglock allowed for me). An app was recently released, Legal Leglocks by Westside MMA. I was wondering if anyone here has it? If so, what do you think? I'm asking because it's relatively pricey ($29.99) for an app but I'd be willing to jump the gun if I know that it'll significantly improve my footlock game. I know Mr Roli Delgado posts here but what do you regular BJJ guys think? Thanks!