Actually Silchar or AGTL extension will be quite difficult as the mps of trains on the NHLG-Badarpur route is very, very low(because it is a hilly area). It would take about 10 hours to reach Silchar and about 11 hour to reach AGTL from GHY. I tried to put a tight TT but still not working out. That is why I terminated my train upto NHLG