Actually all the West & North bound trains from DBRT, GHY & NJP are passing thro' KIR BJU, except Brahmaputra Mail & Kolkata, South bound trains. Therefore, I have not prepared any proposal via KIR BJU.
Regarding RNC NJP Exp via KIR I do not have any information. Because I live in a remote place in Sikkim very near to Tibet where there is no newspaper, no TV channels. My only source of information is a slow speed NET. So, if any of my friend have any information, please share with me.