I just bought the super awesome app Sketch 2 and am loving it but I want to create a shortcut for a tool that currently has no shortcut assigned to it. Many other tools have a single letter shortcut (like the vector tool is just "V", no modifiers involved) but when I try to make a single character shortcut in System Preferences > Keyboard > Shortcuts, it won't let me. It appears I have to provide a modifier and character :( Any way around this restriction?
You can do this with Keyboard Maestro's Device Key trigger:
Device Key triggers can be combined with a macro group restricting to a certain application.