Just found out about this.

Quote Originally Posted by Ualaa View Post
Then I would execute a step on press or release, meaning while you hold the thumb button down, you are mouse broadcasting, meaning right click held will turn your character the same as when you are one boxing.
As soon as you release the button, your mapped key goes to step 2, which turns off the broadcasting of the mouse.
The best way to handle turning all the toons IMO.

Its tricky to set up, but basically mouse button 3 acts as a "hold right mouse down and move" on all the accounts. Aka, you can turn as fast as you want!

Credit goes to Ualaa for this one.