Are you really sure you have it assembled correctly. I found that I needed
to turn parts. That sometimes there was a difference between the right and
left sides. I also found that the instructions did not show that I needed
to do something before I got another 4 or 5 steps into the project. That
certain bolts or orientations were not explained well. When something did
not work or look right, I had to go back several steps to solve it. I think
I remember having to really look close at the safety catch to get it right.