Ok now that I'm paying more attention, I noticed you said he had a kink tail. I've never personally seen one, but from what I can tell this is a strong Siamese trait. So if he's got one that's a pretty good indication of his breed. I don't recall ever seeing a kink tail myself and I was reading on the 'net that a lot of modern breeders were trying to breed that out of their cats, as well as the cross-eye that Siamese used to be known for.