When I first got my Kitfox I immediately realized something was terribly wrong with my tailwheel. It was so bad I could hardly turn around. I'm sure the majority here already know how to set-up tailwheel springs and chains. In any case I thought I'd pass along this link to a video which helped me greatly. I realized that my springs were installed far far too tight. This prevented the tailwheel to unlatch and free caster as it should. Wow what a difference with simple adjustment.

https://m.youtube.com/watch?v=QtokU8mIDQk