thats what i tried, but then i had problems with border edges and the model got kinda screwed up.Originally posted by NeoStrider
if you know it's going to mirror, wouldn't half of a hole make sense? model half of the hole. you can either attempt it with a boolean or you can try extruding faces (and then moving the faces inwards instead of outwards... they CAN go both ways! =O) you can also just move the vertices in the middle where you want the hole away from the middle. instant hole!