thanks got it working in the end. I had a bone in the skin modifier that shouldn’t have been there (doh!)
I still get the invalid bind pose warning when I import though (guessing the same thing as paper hero above) but everything seems to be working fine despite the warning. Once I’ve figured everything out and am sure its all working correctly I’ll probably put a youtube tutorial up going through how to do it so hopefully that will help some. Personally I really like CAT, especially for non bipedal characters, so I’m glad to have got it working 