Distancing custom articulations from the note

[Luca Rossetto Casel]

Hello,

   I'm using Lilypond to produce (among other simpler things) the 
modern edition of a XVIII century opera for my Ph.D. dissertation. I'm 
very happy with it: it's an extremely powerful, flexible piece of software.

In my score, I have to use some modified symbols as editorial 
annotations. And this is my problem: I have found and adapted to my 
needs a snippet to print smaller articulations. Here it is the staccato 
one:

smallStaccato =
#(let ((m (make-music 'ArticulationEvent 'articulation-type "staccato")))
    (ly:music-set-property! m 'tweaks
      (acons 'font-size -3 (ly:music-property m 'tweaks)))
    m)

It works, but the articulation is too close to the note where it's 
placed. How can I modify it in order to increase the distance between 
the articulation and the note?

Excuse me for my English and thanks in advance,

   Luca,
   Italy


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