I've got the Eddie Bravo Jiu-Jitsu unleashed book and I was most interested by the stuff that he does in half-guard, I just have a couple of small issues that need to be ironed out. I asked my instructor but he didn't really like the technique and recommended i don't do it, but if its good enough to tap out royler then its good enough for me! My main problem when i go for the lockdown is that to get it tight and my opponents leg stretched right out i need to have my back flat on the matt. Obviously with your back flat on the matt its going to be near on impossible to work any sweeps, but to get on my side it seems like I have to loosen the lockdown so I can scoot out using my legs and normally my opponent escapes. Is there a trick to this that i am missing or is it just a matter of practice to keep the tension on when scooting out to get on your side?