JS - maybe I should have explained myself a bit more about the picture of the overflow. I was still talking about putting the overflow in the center of the tank but just using that rough design featured in the color photo. I'm not sure what you saw in the LFS
but the tubes leading up to the top of the tank are important; as well as the hook in the pipe leading down to the sump. Now you can hide them with the use of LR
and that should get you the desired affect you are looking for.
Overflow is just a general term for getting water from the main display to the sump. It can be located anywhere really.
As far as noise goes, the hook in the pipe going to the sump will quiet the water flowing sounds.
If you like what you saw at the LFS
, then by all means go with it. As long as there are some sort of pipes or a "box" leading to the top of the tank, then you should be ok.
Hope this makes sense coffee maker broke and I am working w/o coffee 8O