Its not about concentration you sad Beckett...
If you´re working with cdjs or turntables with a mixer in the middle, picking up the wrong needle or ejecting the wrong cd its about concentration...
But when your´re working with a xdj rx, you got both loading buttons in the middle of the unit separated just for 1/2 inch and if you have big fingers like me (I always reserve one of them for people like you!) you´ll probably hit the wrong one by accident. It´s not about concentration, it´s about size and distance, smart a**!
Now, go and buy an RX you little fingers...
Cheers,
:)