This tree is extremely wobbly.  There's no way to make it tight.  All the pieces of it wobble, and my cat only weighs 6 lbs.  She's terrified of it because when she finally makes it to the top, it's so wobbly that she doesn't feel secure.  I'm sending it back.  Unfortunately, I have to pay a lot of money to return it.  I don't feel right selling it on Craigslist and subjecting another beloved to the trauma of the instability.