Heirotitan conversion

Finaly found a use for my 'nids! Heres my mock up of a Heirotitan.



Needs a staff, some scales and a little greenstuff work. But otherwise, what do you guys think of it.

Pose ok?
What do you think of the 'wings'? 
Size?  It does slightly spill over a chariot base. I may move it to a screaming bell sized one.