One of my motors is slightly wiggly. Not by much but by touch you can detect it will a tiny bit of motion on it. The others seem very solid and not even a chance of a wiggle. I tried to find out what holds this in to see if something just needs to be tightened but the screws on the underside of the P2V+'s arms seems to do nothing. Any thoughts or things to check? Any help (even just guesses) will be very much appreciated.