IMHO, diving DIR is a way to dive your equipment with your buddies or 'me' for that fact, and know what each other will do or can do in an emergency if we happen to be paired on a dive boat trip off shore. If you don't have the BP/wing but you do have a BC and know how to use it, (i.e. excellent BC) that's good enough to call DIR. If you dive doubles, and use a thermo manifold with the isolator valve (like I do) and run two seperate regs with the bungee or latex hose second stage around your neck, I don't care if it's some brand from China, it's yours. If your long hose is 5' long, (that's better than a 26" one!) it's fine for me in an OOA emergency. I personally run a 7' hose, that's what I bought and that's what my daughter and I run. If you don't dive wrecks or caves or any overhead stuff, then you're not going to be dressed like George or Jarod are. If you're running the reef, you'll probably ave a single tank, a single reg and a BC. As long as you dive within the limits of this kind of equipment and don't expect me to say you're ok, then it's all good. You're the one who will pay the price for errors in your own judgment. If you have developed your diving skills with every dive you make, then you're DIR. It's all in your head. As long as you know the limitations of your gear, Whatever it may be, then you are 90% there. I don't always dive doubles, with a light and a pony bottle, but then again, I don't consider myself a full fledged cave diver either, but I do consider myself and mydaughter considers herself a fully qualified DIR diver. Understand? It's about how you dive and how you dress your kit out. You don't wear a pair of thongs and cutoffs to climb Mt. Everest, and the same thing applies to diving. Gear up for the dive you're going to make, think out ALL the possible situations that might occur and dress accordingly.
Good luck.
db