So my plan for this project is to start by 3d printing a addon that attaches to the front of the magic mouse, and adds a platform for attaching buttons.

I found this awesome free Magic Mouse Model online, and I'm going to use it in Fusion 360 to make my shelf for mounting to, we will see the accuracy of this model when my 3D print finishes.

I've also found that a 0.8mm spacer under the top of the mouse is perfect to stop the "click" from clicking. Magic Mouse has only one button for both clicks, and only sends a "right" click when the capacitive sensor senses a finger on the right side. This makes playing Fallout 4 very difficult.

I will disable the clicking by shimming this gap, and then the new tactile buttons + Arduino Leonardo will take over the left, right and middle click functions (and maybe a hotkey or two for future binding...)