\partCombine when notes are far apart

[peter]

Greetings,

 

When I use \partCombine and the notes are more than a ninth apart the stems do not connect.  Can I force a longer stem on beats 3 and 4 in this example?

 

 

\version "2.22.0"

partA={ c'' d''4 e'' f'' c'' d''4 e'' f''}

partB={c' c' c' c' c' c' \stemUp  c' c'   }

\partCombine \partA \partB

 

 

Peter Wannemacher