I bought a Nikon D4 and I'd like to have an XQD card in the second slot as a backup, just in case. I'll probably never need it, so I don't want to pay $50 for a new 32GB M-series card (or $75 for a G card). More than anything, I think it's a touch of OCD kicking in, the empty slot bugs me. Anyhow, if anyone has a new or barely used 16GB card lying around, with or without the reader, I'm interested. Please PM me if you can help. Thanks a bunch.