[itsme]

This issue made me stop my experiments regarding chord sheets. A pity, it looked pretty promising so far.
At first I used dummy lyrics lines to specify the width of the measures. I used dots (full stops) because their width is close to the width of blanks and colons as markers for the ends of the measures. (ExactlyLikeYou_7)
Then I replaced the dots with blanks and kept the colons. The alignement of the measure bars did not change (ExactlyLikeYou_8)
If you like to try the attached chordpro files you can see that the bar lines nicely stay aligned when transposing adds sharps or flats so that the width of the chord symbols changes.