Hi Robert, It would be unusual to glue stems together as you are suggesting, if I understand what you want correctly. To use the crossStaff construct the stems have to be in the same direction. No negotiation. :-)
If you really wanted to insist, there are examples of how to move individual noteheads in chords from one side of a stem to another on LSR, but I can't say that this would result on notation in this example that players would be expecting or comfortable with. My principal aim in engraving is to increase clarity, and I fell that non standard constructs reduce clarity and make the music slower to read. Andrew
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