Positioning of markup at grob refpoint

[Urs Liska]

Hi,

is there a way to position a markup exactly at the reference point of 
the anchor grob?

I would like to print a \path on top of notes, and it would be very 
handy if one could have the markup at a reliable starting point (without 
any automatic placement and collision handling).

I hope I expressed myself clearly enough.
What I want is that if I write c-\markup \path ... the 0 0 point of the 
path is on the reference point of the notehead.

Urs