I don't think it's a tooth out, cause I just put the belt on about a week ago and I counted it a whole bunch of times to make 100% sure it was on right. I guess I'll have to check again if nothing else fixes it
As for the CAS and Exhaust Cam, I had this same problem on this engine before it was pulled apart for the headgasket, and I bought a replacement exhaust cam from Pointz which I've just put in. I'll grab a picture of the CAS tomorrow, but I was told last time that it didn't look too bad (if I remember correctly)
What is a keyway / woodruff key on crank?