I was hoping this would show up.
I use something similar - I have a Data partition mounted under /mnt, and not all of the directories are linked in /home. It is handy for navigating to these directories quickly. I was tempted to post this tip here, but hesitated because I did not want to give the impression it was my idea.
I was almost certain what I use is based on one of your earlier posts, and this post confirms it. There is no way I would use something like ddata without outside help; I would, however, shamelessly stealborrow it. I do not remember the thread, but I recall it contained several nice tips worth adopting. Good stuff.