The next Saturn peripheral on my list is the Sega Mission Stick.
This is the black US model MK-80104:

It has been used before but is still in a very good shape. Unfortunately it smells rather strange. Better take it apart to give it a good cleaning.

First separate the stick unit from the main unit (two screws):

 

Next take apart the main unit, six screws (two screws are hidden underneath the feet next to the cable). Then unscrew two silver screws to remove the PCB:

 

And now to the stick unit. The base is secured by six screws and the stick by three screws. The stick is connected to the base with big coil springs. I won’t take it further apart because I’m afraid to damage the four white painted spots underneath the stick. The spots are used by the optoelectronic sensors to track the position. You can see the two sensors for the throttle wheel in the right picture: