Well you have to figure that a cat that has managed to survive the things he has so far isa scrapper and isn't going to be an easy going lap cat.

I am so glad you are keeping him and giving him a chance for a loving life. He really does look so content and happy. Perhaps some of his aggression towards the other cats is fear since he can't see them in order to be able to read their body language so he reacts with aggression to protect himself. I think with time he will learn to trust you all.

Denyce