[RADustin]

I see a few aftermarket sumps that return to the bottom as well.

I'm not sure how the engine will like returning to a small amount of pressure due to fluid height, so I can drill some holes in the tube every 1-2" or so. Then as the tank empties the return will naturally use more of the length of tubing. And I don't have to worry about any weird pressures.

I'll probably do the same thing for the lift pump return.

My biggest concern with top vs bottom return is like I said, noise. Something a late model plastic tank doesn't have to worry about.