[ss3011]

I figure the biggest problem is getting out the old nut, if you have to cut it out, then I guess you could just weld in a new nut , Domm suggested welding the existing nut, If you can get at it , that would work. You could use the rivnut idea, but install it in a different place, so you wouldn't have to get the old nut out . I think you could make your own tool with a longer bolt, nut and washer , you could then hold the bolt, while you tighten the nut, this would pull on the insert , without spinning it . Worth a try !