I've become a fan of TIG silicon bronze brazing as opposed to MIG for most applications. Less heat, more control very little distortion. TIG may cost a little more than MIG but you can do more with it.
Oh you know the trade lol.... My machinest I source work out to recently tigged a broke piece of cast with the silicone bronze and I was impressed. The repair is atleast 6 months old now and no problems. He is a very good welder and knew how to make it flow but it sure seemed user friendly to apply....