Er, made a mistake in the corner FC BBS combo. It's 5B > 6A > jc > j.C > j.B > jc > j.D(lvl3) > blah blah blah. Forgot to put the j.C > j.B in there, lol.
Also, if it does work, test 2B > 6A as a relauncher, because 5B > 6A doesn't work on Jin during j.D corner slide, as you know.