Very, very well done. One of the Ospreys shows two battalion musicians - who had been trained as stormtroopers - attacking a British tank with a grenade bundle.
Sturmtruppen -stormtroopers - was a generic term for assault troops. It was often used to describe British and French infantry as well. The training is the key point, which you have highlighted rightly. I don't know of any examples where specialist stormtroopers in the German army, such as
Sturmbataillon Rohr, included musicians operating in that role. That doesn't mean it did not happen. More likely I suspect, musicians in a non-specialist infantry unit received training in
Stosstaktiken - shock tactics - including training in
Nähkampfmittel - close quarters combat with the likes of the grenade bundles.
Robert