If you are looking for 7 in the place of 4, this works passably well:
!NoteWorthyComposer(2.751)
|Font|Style:User1|Typeface:"NWC2STDA"|Size:16|Italic:Y|CharSet:1
|AddStaff|Name:"Staff"
|StaffProperties|EndingBar:Open (hidden)
|User|Beam.hmm|Pos:7|Span:7|FinalStemLength:7|OneLess:Y
|Marker|Pos:-8.5|Target:Triplet|Visibility:Never
|Note|Dur:16th,DblDotted,Triplet=First|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Note|Dur:16th,DblDotted,Triplet|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Note|Dur:16th,DblDotted,Triplet|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Text|Text:"__7"|Font:User1|Scale:85|Pos:11.3|Justify:Center|Placement:AtNextNote
|Note|Dur:16th,DblDotted,Triplet|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Note|Dur:16th,DblDotted,Triplet|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Note|Dur:16th,DblDotted,Triplet|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Note|Dur:16th,Dotted,Triplet=End|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Bar
|User|TupletMarks.fso|Pos:8.5|span:7|number:7
|Marker|Pos:-8.5|Target:Triplet|Visibility:Never
|Text|Text:"o"|Font:StaffSymbols|Pos:1|Justify:Center|Placement:AtNextNote
|Note|Dur:16th,DblDotted,Triplet=First|Pos:0z|Opts:StemLength=0,Muted,XDotSpace=-1
|User|Beam.hmm|Pos:7|Span:6|FinalStemLength:7|OneLess:Y
|Note|Dur:16th,DblDotted,Triplet|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Note|Dur:16th,DblDotted,Triplet|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Note|Dur:16th,DblDotted,Triplet|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Note|Dur:16th,DblDotted,Triplet|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Note|Dur:16th,DblDotted,Triplet|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Note|Dur:16th,Dotted,Triplet=End|Pos:0|Opts:StemLength=0,XDotSpace=-1
|Bar
|AddStaff|Name:"Staff-2"
|StaffProperties|EndingBar:Open (hidden)
|Note|Dur:8th|Pos:-2
|Note|Dur:8th|Pos:-2
|Note|Dur:8th|Pos:-2
|Note|Dur:8th|Pos:-2
|Bar
|Note|Dur:8th|Pos:-2
|Note|Dur:8th|Pos:-2
|Note|Dur:8th|Pos:-2
|Note|Dur:8th|Pos:-2
|Bar
!NoteWorthyComposer-End