Gyre placement on a 105 gallon Peninsula reef tank

[Aggie1978]

Looking for advice on placement for my Gyre Maxspect 330 on my Red Sea Peninsula 500. I plan to start with LPS and soft corals.
My LFS tells be to place vertically on the upper portion of the overflow box, but all the video I see place it horizontally. I am sure other 500 Peninsula owners here will have some definitive insights. Where do you place yours for best total tank circulation?Thanks!

 

[fishguy242]

hi,i think ideally would be opposite the overflow where main return comes from,downside cord on front of tank