Help. I've undone the flywheel nut about 3/4's of a turn but it then goes tight. Between fully done up and 3/4's undone it is very free. Am I missing something. Is the nut (which is about 1 1/2" long, with the threads only at the bottom, partially captive within the flywheel? i.e. Should I loosen it then use a puller to break the taper, then continue undoing the nut to draw the flywheel off?