Reading this I remembered the cycling shortcuts of the adobe products. For example you press "G" for the bucket tool in photoshop, but if you press "Shift+G" you cycle through the tools grouped with the bucket tool. In the preferences menu you can uncheck a box for just pressing a shortcut more than one time and cycle through a set of tools grouped. In MoI it can be for example, pressing "C" one time it activates the control points curve, two times through points, and a third time it takes you to the sketch curve tool. It can be super useful to assign a letter to a group of tools instead of just one tool. You can still have the option of assigning a key to just one tool and the option of pressing a letter and a modifier key to cycle or just without the modifier key! Just an idea that came to my mind while reading...