Got my Microbrute over the weekend. Absolutely love it, but there seems to be something inside the keyboard that rattles about when I have picked it up. I'm going to be using it in gigs, so I'm abit worried about what ever this is damaging the circuit board. Anyone know of this happening to them? I've got a money back guarantee, so I am very likely to just ask to get a replacement sent. Would rather do that then open it up and possibly damage it...I'm rubbish with electronics.