SC Vskp is too early at Secunderabad at 505. One has to wakeup at 330 to get in the train and also as afternoon dep 1500 is available people will prefer aftetnoon dep then in morning. They wouldnt be demand for 16 coach. As its only 8 coach it's in WL for 2-3 days but the last section Samalkot Vskp has current availability daily after chart preparation. Ideally it should be from SC to Kakinada leaving at 600 and arriving back at 2200.