The Sams Computerfacts for the Model 3 says the following about opening
the case:
"Place Computer on its side. Remove ten screws from the cabinet bottom.
Carefully place Computer in upright position. Remove one remaining screw
from rear of cabinet. Very carefully remove CRT and cabinet top, lifting
straight up and setting it aside to the left (if facing CRT). Be careful
not to exceed the length of the video cable."
How good is this procedure? Is the tube fairly well secured to the top
half of the cabinet?
Oh yes. The CRT is helt on by 4 nuts through lugs on its tension band.
The nuts run onto studs moulded into the black plastic bezel.
The CRT is not going to fall out. The reason to be careful is that you
can break the neck of the CRT against things in the lower case.
-tony