Hi Dom, Thank you for your response.
Perhaps mirroring the feet is not the way to go about creating them? What I am looking to create is a plinth that can be sized to suit any exhibit size. So it could be 1m x 2m or 3m x 1.5m and the position of the feet would move to suit the overall plinth size without having to recalculate the offset each time. Does that make sense?
I thought if I could find the centre of the plinth itself I could mirror (or similar) the original foot around it to the other 3 corners....
Thank you for your help