The eclipse lock machine with two needles; this one stared moving with difficulty, and had blocked entirely.

This picture has the left cover removed, by removing the screws at the bottom, and two in the metal pate at the top, see second picture. One Phillips (already removed on the photo) and one Allen key.

This machine is easy to disassemble as long as the drivetrain is not involved. It wasn't necessary to disassemble the drivetrain in this case. The drivetrain is fixed very tightly, and is also difficult to reassemble.