See http://answerarmy.com/posts/4f82ad9bee You're not the only one with this problem. I have it too. It is a star bolt on mine, not a hex.
I agree poor design.
I have the same problem. It is extremely difficult to get this to fit. I'd like to know if there is a permanent fix for this. Frustrated since the original post is old I'll probably never get an answer. The post says "escalated" but nothing seems to have been done!