I don't know Badings's 9th but I have heard the 10th, which is about 19 mins and in the conventional four movements, for full orchestra. The first movement can be added to the "things strongly influenced by Hindemith" list.
Badings is one of those composers whose reputation never quite recovered from the taint of collaboration during WW 2.
I truly hope that is not the case, we should all be weary (and wary) of those raising issues of collaboration with evil...these were very dark days and one does what one must do to protect their loved ones from an omnipotent despotic government.