@pascal That is very useful to know! I did not even notice those options before, too busy calculating the distance for the next copy.
@jeremyp Knowing that you could also do it this way: Copy your dovetail curve the required number of times, at some equal distance. Draw a line from the beginning of the first to the end of the last. Draw the line that you want to divide at the required length. Use the “Flow” command, with options “Rigid” and “Stretch” checked, to transpose the copies to the correct positions.