I found an old ticket from August 2001 (hmm, right at the time I joined FT ) for a DONE4 BNE-LAX-DFW-LHR-SYD-BNE. What a waste of an opportunity. And back then they were not subject to the 20-sector limit!

Its a good thing I learned much from FT since then. My last DONE4 was BNE-LAX-DFW-SJC-DFW-ORD-LAX-JFK-LHR-HEL-LHR-FRA-LHR-SIN-MEL-BNE. Much better use of the same fare thanks to my FT-gained knowledge and wisdom ^ .