Almost there. I have started taking pictures as a technique to look for mistakes and final details for improvement, so I will not say that he is done yet. Pretty close though...
I think the waystone on the ribcage armour needs to be painted purple as the gems on the gun... And maybe the blue gem should go purple also... Definately some slightly starker shading in the grills on the helmet, red/purple I think. The brown pants could do with a bit of jazz also... Anything else?
I am really happy with the way the gun looks, and also the yellow came out very much like I envisioned it.