Discrete note clusters

[Ebo H]

\version "2.18.2"
{
\new Voice { \makeClusters  <c' d'  e' f'> 4   }
\new Voice { \makeClusters  <a b c' d' >4  }
\new Voice { \makeClusters <f g  a  b >8 }
\new Voice { \makeClusters  <d e f g> 2 }
}

Is there a way to show rhythmic values and ledger lines in discrete note clusters?

DiscreteClusters.ly
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