I have a few DIN-to-Yoke adapters from various manufacturers, sadly none of them work with my Poseidon regs. I can't see why - they work on everything else (I have Scubapro and Apeks, variosu models). Anyway, I thought I'd give Poseidon's own adapter a try so I can still use my beloved XStream regs with all the luddites in the Keys and the Bahamas diving A-clamp without inserts. Lo and behold it works! It's actually a very nicely made thing, and noticeably seems more 'precision' engineered than my others. It also says Poseidon on it, which always makes my heart sing, my bank manager cry, and other people shake their heads. As usual the service from DGX was as perfect as it gets.