https://www.dropbox.com/sh/3ivtrwy58u7ng16/AADTSEHSMBKsLzEG2t7Q6Z3Da?dl=0The AIR 1 and Pilot schematics are available at vintagedoublehose.com Not easy to find as they are not labeled. Make your way to the VDH site, find catalogs and schematics->scubapro->second stages and look for the picture.
https://www.dropbox.com/sh/7b98n5z9.../Scubapro schematics, Parts, Service/2nd?dl=0