In this video I show how I repaired the joystick on my Korg Poly-61. It had been crushed during transport and pushed into the chassis so it did not work.
The joystick has popped out of the X axis support 
X axis support, note the two metal tabs which currently are bent 
Tabs have been straightened to be able to remove the potentiometer 
Potentiometer removed 
Cracked X axis support 
Glued X axis support 
Assembled and Y axis mounted 
Joystick construction drawing from service manual
