I got my D-fly yesterday from KSF. Centering is slightly off to the side but it doesn't really bug me. Overall very nice. Its been a while since I carried a d-fly and I forgot how small they were, especially compared to my endura that's been in my pocket.
I had one and sold it. There were many things I liked about it but there are to many other knives that are just a bit better to make me not hold onto it. Love the steel, the handle to blade ratio, the design, the handle material. Did not love the flipping.
I would look to some of the stainless models that have been in production the longest such as the SS police. There are many models of Spydercos purchased and kept in production that are not really high on the radar screen.