The first thing I noticed when I opened the box on the back side of the instructions were detailed instructions about how to obtain missing parts.  This was my first clue that I was getting what I paid for.  Instructions had 3 easy steps, great, right?  Then I went to do step one and the bolts would not engage the mechanism.  The threads of the mechanism were all bent and there was no way it was going together.  I contacted the website and they are sending me a complete need backrest.  Why not just make the product correctly to begin with?  Ugh, still laying on my living room floor in pieces.