with current speed 12677 will easily reach tvc 8-815 pm. only 14-14.5 hrs total journey. parasuram and ernad already takes around 16 hrs a day from ncj-maq, which has only 2s and cc. compared to that 14 hrs is less.
Moreover in the current schedule, around 15 hrs the rake is kept idle in Ekm (evening 5 pm to moring 9 am) which can effectively utilized if it extend to tvc