Honestly, I picked up the phone and called the new member just as he asked me to do in his PM. We spoke at length about 25lpm regulators, Cluster Masks, the homebrew demand valve, D3, where to find more information and meeting other people with clusters. I listened to his story. I find that actually speaking to people when they request it, asking questions and providing timely answers has great benefit for someone that's just discovering our community.
My "Messaged received and answered." post was to inform those that spend many thankless hours monitoring this board and providing life saving information (such as yourself, CHfather) that indeed someone had taken time to help in a way that wasn't readily apparent.