\revert TabVoice.Stem #'transparent
\revert TabVoice.Flag #'transparent
\override TabVoice.Stem #'stencil = #tabvoice::draw-double-stem-for-half-notes
+ \override TabVoice.Stem #'X-extent = #tabvoice::make-double-stem-width-for-half-notes
\set autoBeaming = ##t
\revert NoteColumn #'ignore-collision
% beams, dots