Cello fingering indications

[Colin Campbell]

My cello teacher is quite insistent that I get accustomed to keeping 
fingers in place while I'm going between strings, so I'm asking about 
the best way to code that in LP.  The only thing I've found is 
repeatCommands, as in this:

%<------------------------------------%<
\version "2.15"
celloII = \relative c {
  \key d \major
  \clef bass
    \time 4/4

   %13
  d8-0 \set Score.repeatCommands = #'((volta "3"))
   fis-3 a-0 d-4 \set Score.repeatCommands = #'((volta #f))
   a,-1 \set Score.repeatCommands = #'((volta "1"))  e'-1 a-0 cis-3
    \set Score.repeatCommands = #'((volta #f))
}

\score {
  \celloII
\layout {}
}
%<------------------------------------%<

Surely I'm missing something less brutal than that!  My instructor wants 
to make the held fingering explicit in many, many bars, and as long as 
he's waving the pencil, I'm unconcerned.  When I'm running the exercise 
through LP to get it larger and cleaner, I'm seriously concerned, and 
very much open to suggestions!

Cheers,
Colin

PS: the snippet will be part of a setting of the Canon in D, set against 
The First Noel in a choir, and while even my beginning cello skills can 
handle 8 half notes, rinse and repeaqt, I'm wanting to put the arpeggios 
on top.

--
I've learned that you shouldn't go through life with a catcher's mitt on both 
hands.
You need to be able to throw something back.
-Maya Angelou, poet (1928- )