Hi, im new to forums but I desperately need help, ive recently bought some bikes second hand and in the process of swapping parts between them I was changing headsets. And the allen bolt that screws into the fork has threaded and now I can't get it out or get the forks off. I know that drilling it out is an option but I dont want to damage the forks because they're haro and fairly expensive. does anyone have any advice on how I could get this allen bolt out?? thanks