Rhythmic Staves

[David Raleigh Arnold]

There doesn't seem to be any straightforward way to get
barlines with a rhythmic staff unless there is another
staff grouped with it.  What good is a rhythm staff
without barlines?  Setting stafflinethickness to 
0.0 causes the barlines to disappear also.  Removing
Staff_symbol_engraver removes the barlines as well.
How can I get barlines with one or no staff lines?

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Information is not knowledge.           Belief is not truth.
Indoctrination is not teaching.   Tradition is not evidence.
         David Raleigh Arnold   address@hidden