So...I've accquired Oxyhackers excellent reg book and the factory service materials and I'm ready to tear into my regs but I'm not exactly sure what I have. I know I have a Conshelf, but not which model. DCA1663 is stamped on first stage, one HP and 4 LP ports. How can I identify this reg so I can order the appropriate parts kit? It came with an Impulse second if that helps. Speaking of which, am having a hard time finding the service materials or much info at all for this reg. Any ideas? Is it safe to assume that an Impulse reg would come with an Impulse octo? It just says "US Divers Octopus" on it, nothing else. I believe my other first is a Cousteau/SEA, just comparing it to the pics in the book. I also have a Sherwood Blizzard first and second that needs servicing. What is the best source for the rebuild kits for these regs?