My pleasure.
 
That one was the first one I did, so it took about 2 hours (lots of learning). One thing I learned from it is to not have mask feathering on (which is why the halos are more pronounced in this one than others). Now I think I could do it in about 30 minutes or so. The challenge of this one is there are around 7-8 layers, each with their own layer mask (for example, each of the cars is on a different layer of depth).