Well, I'm not much good with things that grow in acid soil but as nobody else has come up with anything yet I'll start things off.
Firstly, this is a Japanese plant, apparently used there for bonsai. Knowing what I know about Japanese people, they cannot leave plants alone for five minutes and are always trying to "improve" them. I once had a Japanese house guest who spent more or less his whole time with us trying to straighten up a small tree in our garden. So I would imagine that this particular tree has got used to being messed about with by its countrymen over several hundred years of cultivation.
Secondly, there is a website run by the University of Connecticut which says that the tree will withstand serious pruning and shearing (See www.uconn.edu.) which sort of confirms what I first thought.
It doesn't like chalk and it doesn't like drying winds. Would be absolutely useless where I live.