Ring Nozzle fan duct

After printing http://www.thingiverse.com/thing:1620630 I noticed the ring is not centered on the fan outlet, while my nozzle is. So my heater block was touching the ring.

I remade the ring fan from scratch, using the part I allready printed as reference.
so thanx Arjjck, for inspiring me.

In the pictures, I added 2 comparisation pictures between Arjjck's thing and mine. The one on the right is mine with the fan duct centered.