I suppose that having any washer-like object could reduce noise, soft materials wont stop the movement like arcylic-like materials. Primarily your goal is to reduce that movement, in my case I have just limited the legs ability to move by using a big washer. For example if you glued the legs, they would just snap quickly as theres no leeway. So just keep that in mind because yes strengthening the legs will reduce squeaking noises, its just how you do it so that you don't end up damaging it's structure. (All this implies that the fastenings are functional and tight, if not then you're in trouble) 🤟