Gather pieces needed for assembly:
+ Astro thumbstick
+ Evil thumbstick assembly
+ Evil Stick
+ T6 Screwdriver
Using the T6 screwdriver, remove the TWO (2) screws.
Place them in a safe area, as they are small and easy to lose.
Remove the casing from the Astro thumbstick assembly,
then place it over the Evil thumbstick assembly.
Using the T6 screwdriver, replace the TWO (2) screws.
Your Astro thumbstick is now EVIL!