This is a quite large B&M invert I'm working on. It whas an awesome first drop. The first drop has a small helix like Great Bear, but then it switches direction and sort of but not really does an immelman, anyways, here are a couple of pictures.
http://img82.exs.cx/img82/6938/helix.jpg
http://img82.exs.cx/img82/764/dive.jpg
http://img86.exs.cx/img86/203/groundlevelview.jpg