I voted no as I was thinking of the overflow as the slots that allow water to go to your sump or back chamber. If the overflow is defined as basically the false wall, which I think is what this question was inferring actually inferring, then I will have to revise my response to a "yes". That is the only place safe for my invasive gsp lol and the monti pictured above looks like a cool idea
Hah, I did the exact same thing! I think "back wall" would have been a better choice as a descriptor.