Just as I thought - a silly mistake. The converted property is of double precision and cannot have float assigned to it. I had to learn how to turn on the debug output to see that.
If you set RenderTransformOrigin=".5,.5" on the Grid, it should work with a binding to your original values.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.