Damn your just having crap luck aint ya? :oops2:

the mechanics bestest friend is copaslip anti sieze. if you use it on plugs they will never sieze in, but remember it is a lubricant and makes it easier to overtighten......so go easy on the tightening part.

hope ya get well soon and let us know how the plug repair goes.

cheers

For stuck bolts etc. I use a 50:50 mix of Acetone (nail polish remover) and TQF (Auto box/power steering fluid). Shake it up so it's mixed and leave soaking overnight. If you can cover the area with Plasticine or something to make an air tight seal, so much the better as the mix evaporates. If this doesn't work then back to the other suggestions.

I wonder what happened in the end.

that it to a welder weld a bolt to it just run it out

this is an regular aviation tech school project. remove the tension on the head by cutting away a section of the plug using a cut down hacksaw blade.