Thanks for the feedback. The head was the hardest part as you may be able to determine from the amount of green stuff. I had to sculpt the neck and add the spine to create a smooth transition. The head was one of the first parts I completed. Frankly, the head looked too big when it was only the torso and chassis. After adding the massive claw and sword arm with cannon, the model started to come together. The larger vents on the back helped bulk it up too. I wanted something to look more Khorne. I think the head that comes with the set looks more Slaanesh to me. It would be cool if the Soul Grinder came with more head options, but then I may have never been motivated to create this monstrosity!