Can’t wait to try those too. Other than that (I had screws and some anchors around) they sit rather nicely and give me some much needed space on my desk. I do a lot of singing and high notes. I hope that they arent necessary, since I assembled without the. This takes some getting used to. Its roomy so it can get heavy but most of my items are bulky, not especially heavy - things like tents and sleeping bags that take up way too much room in the car with a dog and two kids. Well, I don’t want to say it, I really, really, REALLY don’t, however, these slippers are getting ONE star from me and it’s breaking my heart to pieces! I recommend saving these in case you ever remove the cross bars. I ve been listening to them for past 3 hours . Just looked at the pieces and its pretty self-explanatory.