If you have already done PLC, then you are done with OCS, and the concern over Tattoos is over. If they can not see the tatt, then they won't know, they would have never known if I had a new tatt when I went through TBS last year. If I were you I would wait till TBS is over, because some people do get their bars revoked at TBS and it would suck to have a Marine tatt if you no longer had your bars, just something to think about, and you may want to wait until you have been in the Marines for more than 15 mikes to get an EGA tatt. On an another note, congrats on making it through OCS and to on becoming a Marine. Personally I consider PLC grads to be Marines during that interim Year that they are back at school.