Don't be afraid to take that baby apart, it would be pretty hard to hurt anything if you do it right. Go to
http://www.lugerforum.com the earlier site of this forum, on the left side panel you will see a tech section and in there should be the complete instructions for taking it apart. I can't help with the inside numbering, I don't have one of them to check. Congrat's on your purchase, it a great way to start.