question about getting accidentals to print

[Adam Good]

This could be a real long shot but here goes:

I'm making pieces that have long rhythm cycles like 28/4 , 32/4 and 
even 120/4

It's important for me to show how the 28/4 or whatever it is is broken 
up, ie:
6+4+4 + 6+4+4

so i use:

\new Voice {
\repeat unfold 8 { s4*6  \bar ":" s1 \bar ":" s1 \bar "|" s4*6  \bar 
":" s1 \bar ":" s1 \bar "||" }
 }

and it works great. problem is, Lilypond still thinks that 1 bar is 28 
beats so my accidentals don't respect my \repeat unfold-ed bar lines 
and I must doctor pretty much each and every repeated accidental note 
within the 28 bar cycle.

anything to do about this?

would it help to make the time signature 6/4+4/4+4/4+6/4+4/4+4/4 , have 
it override that and print "28/4" at the beginning of the piece?

thanks in advance

Adam