JBP-ET BSL would be more than 8 HOURS which is bit high for single crew so the crew change will continue at ET at least for train comings from CSTM/LTT. For pune pnbe they can have one crew change at knw after the one at mmr single crew should be able to do mmr knw 180+140 = 320 KM. KNW JBP should be doable for a single crew only for superfast which can manage Khandwa(knw) JBP in 6-7 hours