Scuffs on joystick

So I know in the game manual it says that no modification of the robot controllers is allowed of any kind, but for the v5 contollers, the orientation is pretty weird, which makes for an awkward transition from the joystick to the face buttons. So it would be a lot easier if we could make and attach scuffs that press the face buttons for us and we press them on the back of the controller, like this:


So i wanted to know if this is legal to do with the v5 controllers, because it is technically an addition, not a modification.

As this is a question about competition legality, we cannot provide an official ruling here.

It should be asked in the Official Q&A.