This weekend I am working a 12U tournament in which they play on a field with 50 foot mound and 70 foot bases. I have worked on both 60 foot bases at the Little League level and 90 foot bases at the high school/ legion level. Are there any differences as far as positioning? It's a 2 man system. Do I set up in the same position as a 60 foot diamond or do I set up as if it's a 90 foot diamond?