Markins M10 - Interesting bit of info

I know there are lot's of threads on this head (one which I am looking at getting) but thought I'd post this little bit of info I just read on the Markins site.
Markins M-10 New in 2005:
"The new grey label on the main knob is color calibrated so that it can be used as a grey card for digital photography."
Has anyone got one of the new models and used this for white balance setting?
W00DY
Markins M-10 New in 2005:
"The new grey label on the main knob is color calibrated so that it can be used as a grey card for digital photography."
Has anyone got one of the new models and used this for white balance setting?
W00DY