I finally broke down and purchased a Katzeye for my D700. While it's not as nice as what's available for DX I have to admit it is a handy tool to have. The split image prism is much larger than I expected, and works like the split image prisms of yesteryear. Now that I'm heading back into MF lenses I'm going to have a little more fun seeing through the viewfinder. Expect a review soon. For now enjoy the teaser image I posted on Flickr.