I can only agree about the unfortunate Joki, it's only trouble, and even Xavier Meniscus had many problems with his units ... but he didn't spoke about it, who is a shame because people would have been more cautious about buying one.
I know the DDD very well because I've been using one since two years, we (the original builders and me) have been changing manythings since the original version, like two bags (expi and inspi), side mouthpiece moulded and not glued, double independent ppo2 reader, spring loaded sorb compartment ...
About EDO04 sidemounted ? it's not very comfy wob, and it's not very easy to manage optimized ppo2 of a SCR with gas mixed originaly for CCR; and Mike is already having low unbreathable ppo2 on surface with a CCR so imagine with a SCR
Jerome