Rotate about fixed point?

[orbisvicis]

How can I rotate Rect.Green.Rotates exactly 90 degrees counterclockwise about the green Circle.Rotation.Origin while maintaining the camera position framed by Rect.Layer.1.Frame? I've created Rect.Layer.2.Frame as the outline element for Layer 2 which guides a 90 degree rotation, but this leads to some translation (wobble) during the rotation. I've created Path.Rotation.Path to compensate but it makes the wobble worse.