I don't know of anyone who has a concept of Graf as a 'tank manuevering playground' Graf to me is all about tank gunnery, not manuever. Hohenfels is manuever.
b,
Well, there's that, and that all shapes and sizes were welcome there, little bullets to big bullets, not just armored units. And I don't recall anyone referring to the place as a "playground", even in jest.
Because it wouldn't have been funny.
But I like to believe I learned alot of valuable life lessons under the stewardship of the 7th ATC.