Yes, you are right that the sound is not so bad when it's grinding. Although, as far as the rattling is concerned...I'm not sure why they didn't add an o-ring underneath the outside lip of the screen tray. That way it would just press into place and stay till it was removed. And no, the difference in wall-thickness I was complaining about does not cause the thicker parts to rub together. Like I said, it's completely aesthetic. The grinder still functions as good as it was intended to, which is why I'm still satisfied with it. It's 100% functional. It's just, for a $50 grinder, I was expecting more in engineering aesthetic details than what I received. I'm still happy with it's actual function...and I'll take function over aesthetic details as far as what I value more.