My friend switched from right to left 4 years ago now. He was a very steady 14h/cap but just couldn't get settled and switched. He is now a single figure, regular player and it has worked wonders for him.
Anyone thinking of doing it needs to answer one question, how often do you practice? If you don't practice often now how the hell are you going to learn to play the opposite way. If you do have the time to practice then why aren't you doing it now to improve using your natural orientation.