I'm not sure if I quite got there, but maybe this can give ideas.
I'm also not sure if this will break other things in your visualization,
but I found that I needed to pivot all of the Times into one column using:
Then all three could be plotted on one graph as different symbols.
I made an attempt to put a bar between before and after,
not sure if it came out right.
Please see workbook v10.3 attached in the Forum Thread.
283212pivot.twbx 29.7 KB