I was wondering if anyone has tried out the new Nike ID Zoom Spider with the zoom midsole. Is the midsole/outsole exactly the same as the old Katana Racer III? Is there a permanent sock liner? If not how thick is the sock liner? I have ordered a pair with the Lunar midsole. I love the upper on the shoe and it fits my foot well, I am just interested in a more firm, slightly lighter midsole. The sock liner that comes with the lunar platform seems thicker than normal and makes the shoe almost mushy. Any feed back?