The issue with the Morghasts' helmets has been resolved. I drilled a hole in the back of the skull, aligning it along the angle of the helmet plate.
With a drop of glue, I attached the pin to the helmet. Once the glue set, I covered the pin with a layer of putty.
The putty conceals the pin, and adds a little more stability to the attachment point. Viola! Removable helmets!
The shoulder and chest armor are all attached to a painting stick so they can be sprayed and painted in a single batch.
All that remains is the wings and feet. I'm currently working on a couple scenic pieces to use as perches. The Morghasts' toes will be modified to fit around the perch and the spirits will be removed from the wings.
Dread Abyssal Assembly
Because the Dread Abyssal that Nagash's Mortarchs ride has an anatomy similar to the Morghasts, I am assembling it, so they can all be painted as a single batch. Despite the complexity of this model, it goes together pretty well.
I don't rememer if I've brought it up on this blog before, but I think the days of simply assembling a GW model and painting it as a single piece are over (for the larger ones, at least). There are so many overlapping pieces used to create the depth of detail that it is impossible to paint the visible areas in the interior once fully assembled.