You have got to be kidding me.
That's awesome.
EDIT: Now time for those suggestions I promised:
- Add a glow to the lava in the pool, to make it look more like lava and not like red water. Have that glow appear slowly and fade away periodically for best effect.
- Seeing as you already released the first tower model at w3c and stated that you were making a pack, I would ask you to consider making an alternate version of this thing, without the chains and the pool (basically what you had in the first wip), because I can assure you, it will find many uses in games and terrains alike.
- The pool's "walls" are a bit bland... maybe adding some small rocks and/or pointy spikes could be a nice touch. Perhaps it would be overkill though.
- Dunno what you plan for the work animation, but a sphere or portal appearing over the top of the spire would be a good choice (imo).
So that's it for now, chap. If I think of anything more I'll be sure to tell ya.