Good one;
if you are lucky enough incase if BSP-MAS SF delayed by 30 min at GDR,you can catch this and reach MAS by 9am;generally i travel like this on Sundays from SPT till GDR reserved and GDR-MAS UnReserved either taking BSP-MAS or Andaman;last year TT this was reaching GDR@6:05am; now only lot of slack time b/w BZA and GDR