dont use bio-balls... use live rock rubble, or just base rock... it will save you agony later. Also the way its set up as of now the bio balls will have no efffect, because the way they work is they increase the surface area of water to air, and with that set up the water level will be up to the area that you have written "drill holes" so if the water is up that high on that side it will be up the same hight on the other side. PM me if you have any questions. I have my Sump/Fuge, however I dont have any pictures... oh also another problem I see now is there will be A LOT of water flow through your fuge... something you dont want...
again like I said PM me if you have questions (the only reason why I say this, is because sometimes I have a hard time remembering which threads I posted on, so sometimes if people ask me questions I dont ever see them, I will try to remember this one, and check back soon)