This client currently uses the Eilte controller 2 with their Xbox. However because of their tremors, being able to accurately control the joysticks and the ability to 'rapid fire' are very difficult.
Other accessible controllers exist, like these ones, however they are either very expensive or don't quite meet the needs to this client. 

Your task is to design a device that will simplify the movements the client has to make to select a particular feature/action on the controller and have the ability to rapid fire. The device must be rugged with a solid base and easy to install. it must also be waterproof and easy to clean.

A good prototype was done in summer 2023 however it now needs to be more rugged so that it is easily cleaned and can withstand a bit of knocking around. The client also requires a wireless connection to the Xbox since the wire is cumbersome for him to use. It should also be easy to switch devices from the Xbox to the desktop.