vertical staff and tab

[Hugh Myers]

I've yet to chase down a working example that given:

\version "2.13.7"
upper = {
  e,, f g
  a b c
  d e f
  g a b
  c d e
  f g a
  b c d
  e s2
}

lower = {
  s2.
  s2.
  s2.
  s2.
  s2.
  s2.
  s2.
  s2.
}

{
  \time 3/4
  <<
  \new Staff \relative c'' {
    <<
      \new Voice = "1" { \voiceOne \upper }
      \new Voice = "2" { \voiceTwo \lower }
      \new Lyrics \lyricsto "1" {
        e f g
        a b c
        d e f
        g a b
        c d e
        f g a
        b c d
        e f g
        a
      }
  >>
  }
  \new TabStaff \relative c' {
    <<
      \new TabVoice = "t1" { \voiceOne \upper }
      \new TabVoice = "t2" { \voiceTwo \lower }
    >>
  }
  >>
}

allows me to increase the vertical distance between the notes as shown
and the text beneath. Hints relative to the small text above?

--hsm