I recently picked up another Arisaka 99 at an estate auction. Got it cheap because no one could get the safety to work/ didnt know squat about the rifle. After closer inspection, I now see why. It looks like the plunger has rotated 90* to the left looking at the rear of the gun. The little notch that should ride through the passageway at the 6 o'clock position on the gun is actually at the 9 o'clock position. This is preventing me from disassembling the upper portion of the gun. I need to somehow get it realigned, but proving impossible. The little notch will not travel past the left side of the barrel housing ,beneath the bolt release tab. Suggestions?