I guess if you really wanted to be anal, you could have saved all your 781's and made a note on them when you had the A code as AC and then logged them in a civilian logbook or something like Logbook Pro. As copilot, that is obviously all SIC as far as the FAA is concerned. The ARMS product is an official document that proves how much flight time you have, but like you said, it doesn't differentiate the kind of flight time the airlines would like to see.