I'm planning a RTW trip in my 9A as well - very interested in your fuel system and HF radio set up. I carry 67 gallons in wing tanks and was planning a 66 gallon "Turtle-Pac" in the right seat for the remainder of the fuel needed. What type of ferry tanks are you using?
I would be pleased to discuss my installation of HF radio and fuel system with you once I get back from the trip.
I have a 22g tank behind the pilot seat and 66g turtle pac in place of the passenger seat.