If you really want TAD, you will get it, just keep hounding the CO of the MOC about it. He has a lot of jobs to fill lieutenants with, but if you really want to go, he will grant it. I got PTAD with my OSO, but after asking atleast twice. There are somewhere from 5-7 units requesting lieutenants for TAD right now, but if you want to go back to your OSO or anywhere else, you will only get 30 days, and don't count on any more than that.