For my Slaaneshi warband, I ordered some of the puppetswar "Demon Children" pauldrons (basically Emperor's Children, but with a skull and wing instead of talon and wing). I'm using the slightly bulkier Mark III power armor as a base, and, from their pics online, I figured the Demon Children pauldrons would blend right in; however, while fitted to the shoulder properly, they do look leaner than the ones that came with the original set. I haven't painted them yet, so that may make a difference; my gut reaction, though, is that they were designed with the standard Heretic Astartes models in mind, and would look better on those than on my MIIIs. Overall, though, very satisfied with the amount of detail.