I wanted to do it so I could put the dust washer under my CP.
The easy way to do this is to slit the dust washer, and peel it off the stick.
Before you hook the joystick base to the CP, push the stick through the CP, and stick the dust washer back on.
Once the dust washer is on the stick, you can put the stick through the base, and then secure the base to the CP.
If the hole in your CP is very small, you won't be able to see the slit in the dust washer.