I have a 1965 convertible with a problem.. my only key broke off into the ignition. I already have a new ignition cylinder but i have tried drilling out the old one with no success.. The old cylinder is still in with a drill hole about a cenimeter diameter and an inch deep through were the keys used to go..I got to the point where the whole cylinder and the outer ring just rotates but doesnt come out... I'd appreciate anyone with any helpful tips...thank you!