encapsulating woodwind diagrams

[Jaime Oliver La Rosa]

Hi all,

I am using the following code to place diagrams in a score:

c^\markup
    \center-column {
       \override #'(size . .75)
       \override #'(thickness . 0.05){
       \woodwind-diagram
          #'flute-b-extension
          #'((cc . (one1h three))
                                 (lh . (b  gis))
                                 (rh . (d dis ees cis c b)))
    }
  }

however, since I have several of these, I'd like to store them as 
separate encapsulated commands that I'd like to call such as

position1 = {\markup
    \center-column {
       \override #'(size . .75)
       \override #'(thickness . 0.05){
       \woodwind-diagram
          #'flute-b-extension
          #'((cc . (one1h three))
                                 (lh . (b  gis))
                                 (rh . (d dis ees cis c b)))
    }
  }

}

And then call it in the score with

c^\position1

but I get all sorts of errors. Not sure how to proceed. Can anyone point 
me to some information?

best,

J