Planet Aquariums built it, but everything was through my LFS, so I'm not really sure if they built it incorrectly or he told them correctly. All I really have is the correspondence between him and myself. I paid the store directly, and there wasn't a "contract" so to speak-- at least not one I ever saw.
I am actually okay with the trim, as it does give some extra options with running cords on powerheads that I was worried about.
I could live with the lack of return plumbing hole, too, as I could just go over the top and anchor it down (I was debating that anyway). But if there isn't any room for powerheads on the end with the overflow, I have to put them all on the viewable end. I am hoping the overflow actually fits in the holes, I haven't tested it yet. If it does, and there is still some space for powerheads, I guess I could live with it.
What do I do otherwise, send it back? Would I have to pay to ship it back again?