hyrum...
The noise is no longer a problem because the overflow is fully submerged and NOT surface skimming.
The corner overflow will be limited in the amount of surface skimming it will provide. Extending it to the bottom of the tank will only create a detritus trap (a place for stuff to settle and rot.
We are trying to tell you what you need to know... you just don't appear to like what you are hearing!
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