Camber question

So got my alignment done AGAIN. Asked for 0 camber and they said this would wear the inside of tire? That doesnt seem right. They set it at 0.5 and i can still visually see what looks to me like too much camber. I dont wanna start wearing my new MT/R's funny. Im tired of going back so im considering adjusting the cams myself. I know how to add and subtract camber but my question is does each mark on the cam equal roughly 1 degree? And is zero camber really where i want it? If i adjust both cams equally will the other settings stay pretty much the same?
Thanks in advance folks.

 

This will give you some insight: https://www.tacomaworld.com/threads/how-to-do-an-alignment-at-home.252256/

 

I’ve been reading that and it’s helpful but I wish I could find something somewhere or someone who knows could tell me if each mark on the cams represent roughly a degree of adjustment. I just need to pull about 4 degrees of camber to get it right but I don’t want that to seriously screw up my other settings.