Someone in the past has broken off a 1/2-13 tap in the 'nut' that one of the belly pan bolts threads into. I'd like to remove the tap before I reinstall said pan. Have a stick welder and plasma and would hope not to set myself on fire working upside down under machine. Hydraulic lines directly above so blowing plasma upwards not a great option. Suggestions on how to proceed with either mqchine???