Is that three questions you are asking?
Removing the Mounting Plate is not needed to access Washer.
And didn’t you get the Joystick out of the Case already, since you are at Mounting Plate?
What do you mean by "whole Joystick off?"
It doesn’t make sense when after that you typed you “can’t get the Mounting Plate off either.”
It is pretty ambiguous.
Some people say “whole Joystick” as including the Mounting Plate.
And well, you can’t get Mounting Plate off unless you get out the “whole Joystick” first.
And that is by unscrewing from the Mounting Bracket.
“Whole Joystick” may mean specifically just the Joystick, not with Mounting Plate.
So it is weird you say you cannot remove Mounting Plate "either."
Because to separate “whole Joystick” from Mounting Plate, obviously need to unscrew from.
In this sense, you achieve getting “whole Joystick off” after you remove Mounting Plate.
So there shouldn’t be any "either."
It is true the screws keeping Mounting Plate onto Joystick strip.
Mad Catz low quality there, like a lot of their previous products.
To get to the Washer, you just simply remove Restrictor Gate.
Then you take off the Joystick PCB.
BAM! You’ll see the Washer.
Restrictor Gate on stock Mad Catz Joystick is incredibly super hard on.
Use a screwdriver from underneath clip to remove easier.