External Overflow box type and placement?

[Acro Edd]

What would be the best way to set up a 135 gal (72" x 18" x 24") tank for an exterior overflow box and sump? What kind of overflow box should I purchase, and where should it be positioned precisely? With some practice glass pieces, I'm sure I could drill some holes in glass, but I have no idea where the ideal location would be.

This is the style tank I'm of getting

 

[Stang67]

I have a Shadow overflow in the center back of my tank. The returns are ro the left and right corners. You could also set it up as a peninsula tank and put it on the right or left side. I guess it depends on what would work best for the space your putting it in.

 

[Acro Edd]

I have a Shadow overflow in the center back of my tank. The returns are ro the left and right corners. You could also set it up as a peninsula tank and put it on the right or left side. I guess it depends on what would work best for the space your putting it in.

Oh awesome thanks! How do you have your return line setup?