I use an office chair with good back support. The arms could be removed, but I prefer to keep them. I do have to turn it over and cut the threads away from the wheels, but not very often (and I do drop threads on the floor, all the time). I have more trouble with threads in the wheels of my saddle chair, which sits near the longarm. Even though I don't use it much, it really collects those threads. Maybe some wheels are more prone to thread collection than others.