No sooner than AN got news of an acronym-designed residence for actor-producer-architecture fan Tobey Maguire than we remembered his changeable real estate history. Previously, he nabbed Peter Zumthor to design his house and just last spring he flipped a vintage number by Santa Monica architect John Byers. His latest is a 1,200-square-foot art studio by Koning Eizenberg. Perhaps that’s where he’ll set up his Office of Mercurial Architecture.