In your situation I think I would try:
2)create a gold card and simply flash any ruu thats got a higher main version,like this one: RUU_Ace_Gingerbread_S_KT_KR_2.52.1010.2_Radio_12.5 9.60.26_26.11.04.21_M_release_201461_signed.exe - download now for free. File sharing. Software file sharing. Free file hosting. File upload. FileFactory.com
If your gold card is not working, or was not properly created then, than the flash would simply fail and there should be no consequences.