This concluding scherzo-like "Fugato" is marked "Allegro moderato" in the key of D major.
It is brisk and brief, and has a nice swing to it. It builds up to the 8' & 4' reeds of the Recit, before falling back to the fonds with Hautbois. There is no "grand climax," but there is a nice sweep to it.
Again, all of these registrational concepts are mine, so, there is no authority to them.