[Brad Pickford]

Hi Dan, Thanks for your reply! I have attached an image to show you what I am trying to achieve. I have tried a basic expression of connecting the lense scale[0] property to the position[0] of the “null”. As you can see in the attached image it scales it too far. So basically I need the scaling of the left and right lenses to be in relation to the “null” position x of the centre line.

Am I explaining it right?

Cheers,
Brad