Cutout for 3" Aeroport

[ThumpinTitan]

anyone know the exact cutout diameter for a 3" Aeroport?

I dont have one in my posession yet but i need to cut the hole out so i can Sand/Primer/Paint the Box
http://img412.imageshack.us/img412/9949/aeroport.jpg (http://img412.imageshack.us/i/aeroport.jpg/)

[ThumpinTitan]

Ttt

[ThumpinTitan]

come on someone knows this!!

[ThumpinTitan]

Bump!!!

[ThumpinTitan]

Up Again!!