Adhu tha, y to waste time attaching d loco in front and detaching it again, though there is enough slack for the same, slack is being depleted in mainline for crossings itself, max within 3 - 6 months entire work will be completed as the work is going on in a very good pace, or to utilise the electrified stretch between VM and MV, MV VM pass can be given E locos on trail basis..