I don't DIR (or at least I haven't taken a course), but this backplate, called platform, certainly looks too complicated to work with. That 3-point waist buckle looks like something out of a toddler's car seat. It isn't designed for the wings to be sandwiched in between the backplate and the tank either, instead the wing seems to bolt on to the edge of the plate, making for a disaster waiting to happen if it comes loose. Poseidon makes some great equipment, i love the regs. I think this one is a loser though.