fluval edge mod

[claymax]

now more questions:
1 the tank is 6.6 gallons i want around 40x turnaround, thats 264gph. is a custom overflow gonna be able to handle that? i guess f its custom, than well i can just customize it?
but mainly what im asking is would it have to be big, too big.
2. to achieve 264gph what are my options for pumps/powerheads, since im just going with a single pump, i would like to be able to throttle it down, or even be able to use a simple controller with it. options?


3. plumbing, what size am i looking at to accommodate this flow 3/4? and should i go rigid or flexy? herbie or durso?