This question is especially for the prior service. I transfered from Reserve to Active and I'm transferring from 63J to 11B, well 11X for now, as my new MOS. I want to know how different would it be. I know OSUT is basic/ait combined for combat MOS's. Will anything be different if I am consider prior service, since I've been through Basic and AIT? Or do I have to go through the whole Red/White/Blue/5th phase again?