i think Wadi is nt in need of a pit line, they can construct all 4 at GR itself ,
IMO , the crew change for all trains should be at GR itslef. Wadi is a deserted place whereas GR is a city. Now a days few specials have started to Skip GR but halts at Wadi , this trend should be stopped. Even the ADI-MAS-ADI Express is nt halting at GR !