Jan-Frerk,
Someone in this forum once pointed me to a simple and effective solution that worked for me: grace notes
(Muted) grace notes (without ledger lines and some extra note spacing) let me "make" exactly what I needed, only the equal sign needs some special attention.
!NoteWorthyComposerClip(2.751,Single)
|Clef|Type:Treble
|Key|Signature:F#,C#|Tonic:D
|Note|Dur:8th,Grace|Pos:10|Opts:Stem=Up,Beam=First,NoLegerLines
|Note|Dur:8th,Grace|Pos:10|Opts:Stem=Up,Beam=End,NoLegerLines
|Note|Dur:4th,Triplet=First,Grace|Pos:10|Opts:XNoteSpace=3,NoLegerLines
|Note|Dur:8th,Triplet=End,Grace|Pos:10|Opts:NoLegerLines
|Note|Dur:8th|Pos:-1
|Note|Dur:8th|Pos:-2
|Note|Dur:8th|Pos:-4
|Note|Dur:8th|Pos:-3
!NoteWorthyComposerClip-End
Bart