Looks quite good.
I painted that "monster" for a friend of mine (zvesa, if I recall it correctly). It might need a bit weight on the opposite side for real siege-operations on the platform (not to say to put some real lead on it), though.
I used spray-colours to paint it. Very pleasent thing to glue and paint. Unfortunately none wants to play siege-scenarios where I am. °_O
beste wishes
Drachenklinge