Sorry for late reply's due to the time zone.
I use a long hose coming from my right post, backup from the left. Like I said DIR setup I have no problems with , I actually adopt some of the config, but I set it up to suit me. I use a manifold and always check the left post after any restriction I encounter. Most Cave divers in Australia prefer independent twins, and some cave you need to be able to carry tanks in one by one. Any way, back to frogkick web site, yes you are right most pictures were taken as a joke, and a friend of mine ( the black and white picture ) was really funny, and when we saw it there we had a good laugh! But other pictures are some of the best divers in Australia that done dives no one ever done before, this is the part that really offends us, beacuse these guys been doing stuff before DIR boys even learned how to walk.
As for deaths, OK this a borad argument, why? well really the only true DIR guys are JJ, GI and their team ( non died thank god ) , but there has been death by so called DIR divers ( I have to dig through old info to find out the details ) but the argument is they are not DIR when they die, but when they alive they are DIR, so go figure. See the way I see it unless you part of WKPP project you will never be DIR, simple.
But what's a pain is the way every so called DIR person try to say that their way is the only way, and most arguments they have are so crap.
Back to the subject, I think if you are running a manifold you ahould be able to check your left post as a second nature, if you can't adopt this, then go independent. You should be able to do this under stress. Do cave courses in US put divers through stress tests? I heard that they do now but intersted to hear from you guys?