I bought a really nice tool recently, it worked easily on the first bolt I tried it on. Second bolt...wasn't moving and I made the decision to leave it as it was, I don't want to break the tool. I wonder if the threshold is, whatever you can get apart using a good tool by hand, take apart. Otherwise, maybe they were meant for each other...![]()
Someone got into the fact that sometimes there's some nasty varnish on the threads plus some thread damage/burred threads that make it almost impossible to get apart.