I'm trying to understand how this guard works and I already know the all too vague "It's used to do sweeps." My main concerns are retaining it and strategy. I feel like leaving my legs in that position for too long will easily result in a pass even with active hook pressure. Is the "trick" to making it work constantly threatening sweeps and back takes? I guess with any guard the trick is to always stay active, it just seems like most other guards allow a little room for hanging out. Any advice on this?