Dynamic components corrupting on interaction

Hi, I have a very simple model (attached) that should rotate around an angle when clicked. Click one works perfectly well, but subsequent clicks just deform the whole model - in rotation and scale. I’m not touching the scale at all so not sure what is going on.

Model is here

Dynamic values are relative to the boundary box of the item

The model is scaling as it rotates,the boundary box is changing, to see this display the size and position values in stick and pin. You can set these values so they will not scale with the changing boundary box.

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Perfect thanks. Working now.