I have an older model (~8 years) and one of the wheelbase arms broke off. DXRacer was responsive to my email question and told me which base would work with my model. If you're looking for parts, the links can be found in the FAQ question: "If my chair's warranty has expired and I need to purchase corresponding parts, what should I do?"

It was very easy to assemble and took me 20 minutes. You can do it on your own, but it's quicker and easier with two people (the backrest weighs quite a bit and the other individual parts aren't exactly light either).

Clear instructions. The manual included a QR code that, when scanned, took me to a video of the chair's assembly process. From all that work (it isn’t a lot of work to assemble the chair, but just keep going with the story here) of assembling the chair. This chair can provide more comfort. Love it.