Stuck swing arm bolt

Ok Guys after a week of trying to get a frozen in swingarm bolt out of a YZ250 in every concievable way here is the magic trick,You can thank or pay me later. First use a 1/2x 16 tap into the open side of the swinwgarm bolt as deep as you can get it. Then cut a piece of 1/2 all thread about 6 inches long and screw it in. Then find a good deep well impact socket and put it over the allthread then a good thick whasher and nut and whalagh? you have a swing arm bolt extractor. It was still a fight from hell but it finally came out hot as a firecracker