hakkman 5 Another man wrote about this bolt.やっぱり、まっすぐには行かない。So, what I did was...Not tighten the bolt all the way.I put it in enough to secure the pieces.As the bolt strips, and wears out, I can tighten it again and again, a little at a time.In that way, the pieces will hold for a longer time. After those have worn out, if have to use a larger bolt and rethread the insert.The other thing I don't like are the handles to lock the position. They're too far to reach and I have long arms. Must be difficult to lock the position of you're a short armed person.Other than that, it's a great big chair for a good price!