Ah! Very good point indeed. I'm going to draw the outline of the overflow box on my cardboard and recheck. Could you please confirm if the overflow box dimensions are about:The issue I had with the aquascape is the overflow box sticks out quite a ways and creates 2 huge "corners". You will see when you put the rocks in. Looks good though.
10 1/2" by 3 3/4" (270mm by 95mm)