Beam start and end position

[Peter Van Kranenburg]

Dear list,

In this example:

---------
\version "2.16.2"
\score {
\new Staff \with { \override StaffSymbol #'thickness = #2.0 } { 
\relative c'' { g16 a bes c } }
}
---------

The beam does not overlap the stems of the notes entirely, which does 
not look very nice (see attached png). It should start at the left of 
the first stem and end at the right of the last stem rather than in the 
center of both.

Could someone advise me on how to extend the beam a little to the right 
and to the left?

(I need thick lines for engraving the music in a stone).

Thanks in advance!

Peter van Kranenburg

beamlength.png
Description: PNG image