centering numbers in time signature

[Adam Good]

Hey all,

In the example below I want a time signature of 32/4 to show but I'm  
having a hard time getting the "4" to be centered under the "32"

thanks!

Adam

%%%%%%%%%%%%%

% create 32/4
tsMarkup =\markup { \override #'(baseline-skip . 2) \number { \column  
{ "32" "4" } } }
\relative a' {
\override Staff.TimeSignature #'stencil = #ly:text-interface::print
\override Staff.TimeSignature #'text = #tsMarkup
\time 4/4

c,4 d e f g a b c, d e
}