Mornin' all

I'm thinking about converting the Forge World Mourngul into a Daemon Prince for my Death Guard.
But I'm a little concerned about the pose of the model - specifically, how well does it support it's own weight? I don't want to add bits and pieces to it (something to count as wings) only to find that its spindly little noodle arm bends easily (thinking specifically about the example of Finecast Mangler Squigs...)
I can pin the shoulder/wrist/palm of course; but I assume that it isn't practical to pin along the entire length of the arm.

Does anybody own one? How well do they defy gravity?