I've noticed a noise when I star my motors which is very brief and sounds like metal on metal. I'm not sure if it's always done this and I've just now noticed or if it's new. I can't tell which motor it's coming from. Just curious if this sounds normal and if not what the issue might be. Thanks.
http://youtu.be/s0hFGchldH4
http://youtu.be/s0hFGchldH4