Have a broken off 1/2-13 tap below the surface of a 'thru' nut. Have a stick and MIG and plasma. I'm working upside down under a loader and would prefer not to set myself on fire. If I aim the plasma torch upwards, I risk hitting hydraulic lines. Somewhere I think I heard you could burn a tap out with a stick welder but am unsure of rod to use and even if this would be best method. Advice surely appreciated...