Those are interesting techniques Lowboy.
I usually play with the hose, so reaching the chest isn’t too difficult for me.
On my old vintage Hohner 32 I can get something of a wah sound by wavering my hand(similar to harmonica technique) over the holes on the back.
However it doesn’t seem to produce the same effect from other melodicas and the Hohner 36 as you know has no holes at all so not much happens with it.
Oh, and don’t sweat the typing 🙂 I never even noticed.