no, i don't think so. when i was talking to stefan k. from aqua computer berlin, he said, that mounting a 1800 rad on the side of your case is possible by 4 m4 scews and some "Abstandshalter" ( bolts, which are several cm long to make some place between case and rad)
like that one, but you do'nt have to choose the bolts that long, depending on what you are cooling