I've been searching the forum all morning and found a huge amount of really useful information, but so far no answer to the question I came here looking for. Maybe someone can end my agony, haha. I was recently gifted a Stihl Wood Boss 028 AV that was leaking bar oil. So I tore it down and replaced the gasket on the oil pump. No issues there. But then I reassembled it and had one screw left over. I tore it back down and for the life of me couldn't find where this thing goes. I'll attach a picture. Anyone recognize this screw? *The head is slotted.