Bump to this thread. Now that you've had a chance to play with it a bit, how about a comprehensive take apart, put together and tune update? I have an AIR 1 and a Pilot converted to an AIR 1 but haven't begun the tear down yet.
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Do you know how many brain cells you lose in almost 4 years when you get old?
I didn't even remember this thread. But I do remember making note of which side the lever was on, how the wireform spring installs, and don't mess with the diaphragm unless it is absolutely necessary (like the sealing surface need an acid cleaning). Most of the working bits are the same as a D-series. I put two of these in service back when I started this thread and dove them almost exclusively for over 2 years with no problem other than the extra care on managing free flows. They sure do breath well. Then I got an original pilot and moved it to first string and these went to backup. Now I picked up a second original pilot that looks almost new and I suspect it may still have original o-rings. It leaks pretty bad but I have done nothing further with it yet.
After playing with and really enjoying some of these scubapro oddballs I have decided that 109s and 156s are probably the smart way to go. Parts are reasonably available (there is still some Scubapro support), they are really easy to service, and it is really hard to detect any performance difference between them and any other high performance 2nds.
If I had to marry a 2nd stage, it would be a 156. For you younger folks, a G250 might have less wrinkles (but it is plastic).
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