How Castor affects Camber

I'm not happy with the pattern of tyre wear on my car. I recently installed adjustable castor bushes and I thought I understood what they would do for the steering geometry. I was wrong. In this video, I explain what I found when I made 60 different camber angle measurements as the steering wheel on my car was turned through 160 degrees.
You can find the details of how I made these measurements at pauloffordraci...
BMW 1 Series Mods 116i E87 N45 N45B16 Race Car Build 2004 2005 2006 Paul Offord 116 Trophy 1.6L Strongflex polymer bushes PFF5-401G tension arm caster #116trophy MacPherson

[@loekfelten548]

You have me confused: castor = caster? Or is it something else ?

[@PaulOffordRacing]

Castor - English, Caster - American