We are super pleased with our extension. The directions were a bit vague, but we called the # on the invoice and spoke with someone. He was super helpful. We punched in new rivet holes and secured it with the rivets and tape. It's super tight. We used duct tape b/c it is extra sturdy. We are 100% satisfied. Saves money b/c we didn't have to buy a new cage. Happy this was an option.