I purchased a model RZ38-02770200-R3U1 back in September of 2017 and it has been a great chair that gets used daily. It has held up very well but now it has started lowering itself every time I sit in it. This has been my favorite gaming chair as well as my grand kids favorite chair and I really hate to have to get rid of it. Are there replacements parts still available for this chair? If so, how do I obtain a new cylinder?
Thanks

