i just bought a used 192g plexi tank and it doesn't have a bulit-in overflow. i am thingking of using 2 1" bulkheads for my overflow to get a clean look instead of having a regular overflow box that hangs on the back of the tank. is their really a difference on having a overflow box compared to a bulkhead/drain? can you guys pls post some pics of your diy bulkhead/drain so i can have an idea on how to do it. suggestions are welcome also. thanks