Beam/Stem question

[Thomas Scharkowski]

Hello,

I am still practising :-)

How can I shorten the stems and/or change the angle of the beam in the 
following example, so that the note in the lowest voice do not collide 
with them?

Thank you!

Thomas
cywin/xp

--

\version "2.1.26"
\header {pagenumber = no}
\score  
{
        \notes
        {
        \context Staff <<
        <<
        \relative c'' {
        {
        e e e e
        }
        }
        \\
        {
        \override Voice.TupletBracket #'number-visibility = ##f
        \override Voice.TupletBracket #'bracket-visibility = ##f
        \times 2/3 {e''8[ b' g'] e''8[ b' g'] e''8[ b' g'] e''8[ b' g']}
        }
        \\
        \relative c' {
        {
        \stemDown
        e4 b g e
        }
        }
        >>
        >>
        }
        \paper
        {
        raggedright=##t
        indent=0.0 \cm
        \translator {
        \ScoreContext
        \remove Bar_number_engraver}
        }
}