To get started, turn over the 01/W.  Prop it up so you don't damage the joystick.

Remove all the screws from the bottom except for those holding on the feet.

There are 17 black machine screws.  The 5 along the rear panel include a lock washer.

Here you see the 01/W-FD with the bottom cover removed.

Here's the other end.

At the low end of the keyboard is the disk drive, which must be removed.

Unplug its flat, gray cable where it connects to the main circuit board.

Remove the four gold screws circled in this photo.  They hold in the drive unit.

Two of the screws are long, self-tap screws and two are small machine screws.

To unplug the drive's power cable, use a small blade screwdriver to pry open the locking tab.

Here, the drive unit is removed.