[LAU] Are there Guitar Tab Editors supporting uneven time signatures?

Hello to all, I play bouzouki and guitar and most of my music repertoire is in (Eastern European) uneven time signatures (5/8, 7/8, 9/8 etc). I was trying to write Guitar/Bouzouki tablature/notation of this music on Linux in the past but without much success. The main (hidden) problem with these rhythms is the grouping of notes, i.e. 5/8 can be 2+3/8 or 3+2/8, 7/8 is 2+2+3/8 or 3+2+2/8 etc... Thus the grouping of the notes needs to reflect this fact as it is essential for the performer. My experience so far: Songwite, Gnometab and Kguitar don't support this feature. Lilypond - great for output, covers almost all needs, but grouping has to be done bar-by-bar which is really time consuming. Chords are not supported well for now (name and display) TuxGuitar is amazingly easy for note input, but it doesn't support note grouping as well. I requested this feature on their forum some time ago but no response from the developers so far Exporting Tuxguitar to Lilypond is what I use at moment, but for a longer instrumentals in 9/8 with say, two bouzoukia, it takes days to edit/produce a clear tablature/notation. Any suggestions on this will be greatly appreciated. Viktor