You can also watch there what a great mod Altaïr made (
Closest Approach Line), and how easy it is now to stage multiple gravity assists with this mod, eigher several times with one celestial body or with multiple different bodies, or how to find out a good way to meet your target over many laps. You can look at example after 13:45 in the video.
And you also can see the example of using another very nice mod from Altaïr (
ANAIS), which shows different transfer windows with different opportunities, whatever you wish, and shows useful additional information about what delta V we will have with the target as well when we meet it, and not only what delta V is needed right now to catch transfer window and start the transfer, like in default game transfer window. You can look at it from 11:57 in the video.