Ok , so I know my mistakes , I didn’t do my research , went at my window bolts wirh force and stripped two of them completely out. The first two I done came out first try completely fine , the second ones however have completely stripped. To cut a long story short I’m now stuck with extractors in both and not a clue how to get them out. I tried heating them , tried making a notch and trying to walk it out like people suggest but all that done was slip and scratch the paint. I’m at a loss here , can anyone suggest anything ? Or do you think this will need a nut welded on at a shop?