Hi Kieren, Sorry for the noise!
> Does <https://github.com/davidnalesnik/lilypond-text-spanner-inner-texts> not > suffice? Unfortunately, it doesn’t look like it. \textSpannerInnerTexts doesn’t support arrows— https://github.com/davidnalesnik/lilypond-text-spanner-inner-texts/blob/72555b802b0ef7dd367cf3dcdde2ecb020c60dca/text-spanner-inner-texts.ily#L362 —so something like `\override TextSpanner.bound-details.right.arrow = ##t` has no effect. Also, it looks like inner texts are always spread evenly between a spanner’s endpoints— https://github.com/davidnalesnik/lilypond-text-spanner-inner-texts/blob/72555b802b0ef7dd367cf3dcdde2ecb020c60dca/text-spanner-inner-texts.ily#L109-L112 —but playing techniques very often must be associated with a note. (It may be possible to align inner texts to notes using empty strings as in the “Spacers” example, or translated markup as in the “Markups/line styles” example, but for more than a couple playing technique transitions, I think this could get unwieldy.) Thanks! Nate