hehe, if I were, I would not had been so headache about the RFE. I learned about a few names (including fsa2000) on this board, who provided expertise to other people in similar situation as me. Didn't mean to advertise for him. I know I will post a feedback once I decided to work with him - no matter good or bad, just as a 交代. It turned out to be satisfying, saved $$ and time.