I solved this one on the night it came out but it took me about an hour to complete it. I'd noticed something right away but had dismissed that and went down another track. When that didn't work out I returned and the numbers dropped out quite quickly. A very neat puzzle.
I had to laugh when I went through the geochecker as I'd only noticed one of the clues (although I remember thinking that another word did look suspicious).
On the way here we were enjoying listening to a long story on the radio. That led to us missing the parking space so we had a long walk to the GZ. An easy find when we arrived though.
Took the 8TF certificate. Swapped smurf for keyring.