CADaver...
I'm a southpaw too amigo....(we're the only ones here in our "right" minds)....it only takes about a week to learn to "mouse" with your off hand....seems like forever, but......
I've been using it for about a week now, and even having to go to the cheat-sheet now and then and struggling with the mouse, I'm about as fast as before I got it. Gimme another week or two and I'll be cruisin'....