Adding detail to the Khorne Lord of Skulls and two Heldrakes

Just felt that this Khorne Lord of Skulls needs more bulk, detail and generally all around chaotic vibes. So have been sculpting in more demonic faces that emerge from everywhere, hooked claw-like appendages, cabling, bolts and rivets. Also filled the mouth with skulls that this gigantic demonic engine drinks all the blood from to fuel itself. Then there's a couple of Bloodletter skulls to push the vibe in even more Khornate direction. But I still don't know what to do with the wheels. Should they be left like that, and painted dark and dirty to not draw attention away from everything else? Or maybe sculpt in some demonic textures and glue in dozens of spikes? One thing to consider is also the handling of this model. Not that many places to lift it easy & safe while painting and gaming, if the wheels get filled with tiny detail and spikes. Anyways, I'll soon get to glue in the teeth, the arms, the shoulder pads and then finish sculpting around those areas. Gotta start thinking about the painting!

Two Heldrakes get basic shapes on. Toy aeroplanes, paint & glue bottle caps, Lego Bionicle parts, cheap hobby clay and mixes of Green Stuff and Milliput.