Work on GTL-WADI electrification is going on full swing, I expect it to be completed in an year (By Sept-15). So in an year, Rajdhani, Duronto could fancy electric locos end-end. Else, They should get Electric Loco from SBC/YPR-GTL. From there a diesel loco could be attached without removing Electric loco. At SC, that diesel loco should be removed and electric loco can resume the journey.