In the style of "Stick Control for the Snare Drummer" I'd like to set my page in two columns having 12 2-bar phrases in each. I have this attempt which is nearly exactly what I want, except I would like the 2-bar phrases to line up. This could be achieved by e.g. making the spaces between each consecutive 2-bar phrase equal but all my attempts by following the manual have failed so far - presumably because everything is wrapped in markup. The approach with markup was the only approach I found to create multiple columns, which I found here
Is there any other approach that could be used, or is there some variable I could poke in order to make the systems vertically equidistant?

\fill-line { \override #'(baseline-skip . $MAGIC_NUMBER)and correct them and actually get a passable result. I'd rather not go through all files manually, though... – – fcar Sep 13 '21 at 18:30