Tuplet brackets on subdivided beams

[Nick Payne]

I'm trying to reproduce the layout in the attached png, which occurs in 
quite a number of bars in the piece, but there doesn't seem to be an 
automated way in Lilypond of suppressing the tuplet brackets on the 
subdivided beams without also suppressing them on the non-beamed 
tuplets. Is that the case? At the moment I'm manually changing the 
tuplet bracket visibility each time this happens, as in the example below.

\version "2.17.13"

tboff = \override TupletBracket.stencil = ##f
tbon = \revert TupletBracket.stencil

\relative c'' {
  \time 2/4
  \key f \major
  \tupletSpan 8
  \set baseMoment = #(ly:make-moment 1/8)
  \set subdivideBeams = ##t
  <e a, cis,>8\arpeggio \times 2/3 {
    b16\rest b\rest a \tboff <e' a,>16 <e a,> q q <f d> <g e> } |
  <e a, cis,>8\arpeggio \times 2/3 {
    \tbon b16\rest b\rest a \tboff <e' a,>16 <e a,> q q <f d> <g e> } |
}

selection.png
Description: PNG image