Okay I got your concern. You need fastest SF from Bangalore to Mumbai so as per that you are right now. But as you mentioned zig zag trains like Hampi, Golgumbaz, Basava etc Hampi slightly zig zag but what about Golgumbaz exp. It's name itself shows it's major train for Bijapur And also it covers Bagalkot Gadag Hubli.. It's origin from solapur don't consider its important and major for solapur to run it in shorter route via GTL RC Wadi.. SWR taking over Gadag Express and making full fledged train is dream itself. If SWR start new train to Mumbai from Ballari it won't get good TT in CR which in turn makes less useful for more passengers.