No. I've never seen a kit setup this way. This would seem to really complicate things unnecessarily. It is definitely non-standard. It would put more of the 1st stage back behind you where it can more easily snag on something (fishing line, nets, etc.). Yes, there is less there to bang your head against, but DIN 1st stages on a DIN tank are designed to leave you enough clearance. It also puts the tank valve on the opposite side from where a buddy or mate on a boat would expect it to be. I don't really see a benefit to this routing and can see multiple negatives.