I have taken the viewfinder cover off but not the others. Anything that I need to watch out for when removing them?
Which model, I or II? On the first version (I), the focus scale is integrated to the cover. Before removing, rack lens all the way out and note where the 3-1/2 foot mark is. Should be under the infrared red dot. When you take off the cover, the scale will rotate back under spring force. To reinstall, you need to remove the glass cover plate (two set screws on side, very very small! lift edge with finger nail) and rotate the dial to get 3 foot to line up again. Clockwise, I think? Reinstall cover cover, wiggle a bit to get teeth engaged, and see if you hit it.
I/1 also has a screw going into the shutter release button, and that button needs to be aligned for working and reinstallation.
II/2 is pretty basic, no traps. Check washers on wind knob top (look inside the cover to check for a hiding one). And felt light trap around shutter button. Also small ring under the small round window on right side of viewfinder is easy to have drop out and not notice (then again, who cares? has no real world function).