Yes 12324/12820/12826 ka time change karke before NE departure de sakte hai, thats a good suggestion. But NE ko rok kar OT karwana will be disastrous for NE, abhi iska ANVT-CNB ke bich itna aggressive TT hai to CNB 40-60 mins roz delay hota hai.. NE ko bich me rok kar 12324/12820/12826 se OT karwane lage to CNB tak hi roz 2 hrs delay se aaygi :)