There are some trains which have such arrangements. 17255,17229 in SCR also have an RSA, but 1 H1, 1A1 coach are removed from the incoming 17255 and a PC, GS coach are added to the rake for 17229. And the PC is added in the center of the rake and GS at the end. So, that's a lot of shunting. The main rake belongs to BZA division of SCR while the shunting and addition/detachment of coaches takes place at HYB under the SC division of SCR.