Notes inside markup

[Nick Payne]

I'm reproducing a score that contains the construct shown in the 
attached image example.png, with four 32nd notes below the stave inside 
braces. With the ly code below I can get the output attached in 
test.png, but I haven't managed to figure out how to raise the beamed 
notes so that they are between the braces rather than below them. How 
can I do that? I'd also like reduce the weight of the beams on the notes 
inside the markup. They don't seem to get reduced in weight when the 
size of the notes is reduced.

As an aside, the \stemUp that I have at the beginning of the file is 
being ignored by the d16[ c32 b] at the end of the file. Is this a bug 
or due to something else?

%%========================
\version "2.15.40"

\relative c'' {
    \stemUp
    \slashedGrace e8_\markup {
        \concat {
            \fontsize #6 "["
            \score {
                \new Staff \with {
                    \remove Staff_symbol_engraver
                    \remove Time_signature_engraver
                    \remove Clef_engraver
                }
                \relative c'' {
                    \set fontSize = #-4
                    \override Stem #'length-fraction = #(magstep -4)
                    \stemUp
                    c32~[ c c c]
                }
                    \layout { indent = 0\cm }
            }
            \fontsize #6 " ]"
        }
    } d16[ c32 b]
}
%%========================

Nick

example.png
Description: PNG image

test.png
Description: PNG image