Luckily, the Xbox controller fundamentals have changed relatively little since the move from the Duke to the S controller during the life of the original xbox.

Luckily, the Xbox controller fundamentals have changed relatively little since the move from the Duke to the S controller during the life of the original xbox. I say luckily, because I feel they got pretty close to the optimum design around then, and later enhancements have been about mostly shuffling the battery components around.