Vertical stakes at Cheesewood

Hopefully four 3/4" diameter landscaping stakes (hollow aluminum wrapped with green plastic), wired together on top, will hold the tree from wind toppling, which has already occurred twice over the four and half years it's been in the ground. All guy wires have been disconnected, but still ready in case of gale-force winds.
Pittosporum Undulatum or Victorian Box or Cheesewood