viewfinder

Hi, I'm a total newbie...and disassembled the viewfinder on my 104 Land Camera because the focus arrows weren't moving. So I unscrewed the two screws and think I may have actually fixed the focus issue! However now I don't know how to put things back together :( I have two loose mirrors and a...

Hello, I bought an old nikon FG-20 play around with, and when I look through the viewfinder, i see black specs of i guess dirt or dust. Unfortunatly it seems to be on the other side of the viewfinder inside the camera... Does anyone have experience in cleaning the insides of these cameras?