I don't think RSA ki zarurat thi fir..
HWH me 13016/15 aur 13053/54 ka ek ek rake without RSA bhi maintenance ho jata..
I am damn sure ki kisi ek rake ka hi maintenance hoga ab is RSA pattern me.. ek BGP ek RDP me hoga overnight.. HWH CDO ek hi rake ka maintenance karega i mean one rake will get maintenance at a time phase wise..