Option 1: Just write it in the description of the plane.
Option 2: Download the earlier design from the site as if it was someone else's plane. Change it, save it under a different name and re-upload it. It will now show up as a successor of the earlier plane.
@Geekpride Thank you!
Option 1: Just write it in the description of the plane.
Option 2: Download the earlier design from the site as if it was someone else's plane. Change it, save it under a different name and re-upload it. It will now show up as a successor of the earlier plane.