Another quick update from me tonight. I've made a bit more progress on the Slaanesh Soul Grinder:
You can also see off to the side where I've started building my second Soul Grinder. That one will follow much the same template as this one. I still haven't worked out what I'm going to do with the gun arm... I might just use the autocannon from the Defiler, but I kind of want it to look a little different (and less like a twin-linked autocannon, which it isn't).