They sell quick release flags at Silver Lake with the airline coupling on them but I have had three of them pull out at the threads and once they strip the fine threads of the air fitting they do not stay together. I never rolled it either to destroy the threads. Just riding and I try to ride hard but realistically I am not beating on the machine that bad.
Just a heads up if you try the air fittings. The ones they sell at Silver Lake at Duneland Performance WILL come apart at the fine threads of the Air fitting. If you build one yourself make sure its got some meat to the threads.