Nikon 14-24 filter systems

I've got the Wonderpana setup from Fotodiox, with their CPL, a couple of the circular ND filters, bracket upgrade and one of their 6x8 GND filters. I'm very pleased with it. Don't know if you've found this, but here is a quick review discussing it.

http://www.nagelphotography.com/blog/2012/10/fotodiox-filter-for-the-14-24