Sinfonia Smith Square, London Tom Morris’s staged take on Mahler’s first symphony is valiantly performed by Stephanie Childress and Sinfonia Smith Square, but the result feels more like R&D than a finished product If you’re Macbeth, a moving forest generally isn’t a good thing. But what if you’re Mahler? The instrumentalists of Sinfonia Smith Square, conductor, Stephanie Childress and director, Tom Morris decided to test the result in The Mahler Experiment . As Morris declared cheerfully at th