Rounded off lug nuts on my Ranger Trailer, managed to get a couple of them off, no success on the others. Any suggestions or ideas on removing the remaining nuts without cutting them off? Had a blowout a few weeks back so replaced both tires at local tire dealership, discovered this when the valve stem went bad in one and got ready to remove tire, suspect impact gun. I know, first lesson, find another dealership! Any ideas/solutions appreciated.