Is it possible to make Left Alt+A and Right Alt+A do different things? And of course, other modifier keys.
If not, maybe the following idea would work? If AppleScript, Python, Ruby, Perl etc. can detect left/right modifiers I can set complicated key bindings in sublime text (like ["cmd+ctrl+shift+alt+a", "cmd+ctrl+shift+alt+a"]) and send those keystrokes with AppleScript or Automator?