Dynamics take up too much space

[Rachael Thomas Carlson]

Dear Lilypond Users:

I have been having a conundrum as of late: I use a system of notation
that requires as many as six to eight textspanners to be present at any
given time.  I generally do not need that much (more like four or so)
but the functionality needs to be present.

The way that I have accomplished this is through the use of multiple
Dynamics voices.  This leads to a ton of extra space at the bottom of
each system.  This really erks me because I don't use a lot of that
extra space that six or seven Dynamics voices create at the bottom of
each staff.

My question: is there a way to make the '  \new Dynamics = ' context not
take up any, take up very little, space at the bottom of a system?

If you know of a better way of adding tons of markup to each system,
please do not hesitate to help me out.

This is what my that section of my score looks like if I have been
unclear:
\new TabStaff = "guitar tab" <<
      \set Staff.stringTunings = \stringTuning <a,, a, d g b e'>
      \new Dynamics = "sixstr" \sixstr
      \new Dynamics = "dynamicsone" \dynamicsone
      \new Dynamics = "dynamicstwo" \dynamicstwo
      \new Dynamics = "dynamicsthree" \dynamicsthree
      \new Dynamics = "dynamicsfour" \dynamicsfour 
      \new Dynamics = "dynamicsfive" \dynamicsfive  
      \new Dynamics = "dynamicssix" \dynamicssix
      \new TabVoice = "tab" \tab
    >>

Thank you kindly,
Rachael