Does anyone have an editable version of that map and could plot the flight data of SIA68 onto that? I have done some playing around with the flightaware data and can confirm that, if the westwards sightings are half way correct, it could be possible to let MH370 sneak under the radar hood of SIA68 at about IGREX, They could even squawk the same and any radar would interpret these double echos as faulty.
Anyone aware of the radar coverage around IGREX and later NW? If this theory holds, MH370 could sneak out later for i.e. Myanmar or Pakistan or or or ...