Just gradded my copy and there no mention of vehciles types in the index. So short of reding the book, its going to take a spot of luck to find it.
Checking my referance, the first mention of /22 was in the notes of a meeting between Hitler and the Inspecor of Panzer troops on 28th Oct 44.
In late Nov Hitler ordered that all /9 in production be held up and switched to the longer gun. The first demo took place on 5th Dec and 40 were built in that month.
At the end of Dec it equipped the 25th and GD Div in the east and 9th and 11th in the west.
Thats the only unit info i have.
I am a Norfolk man and i glory in being so
On the bench: Airfix 1/72nd Harrier GR.3/Fujimi 1/72nd Ju 87D-3