Basically the location of the bluetooth antenna means if you have the mac back facing towards you its fine, RSSI (Signal strength basically) is 0 which is the best you can get. Move it so the side with the door is facing the mouse, this drops to -10 and jumpyness occurs. So basically I need to source an antenna from the MP 2009 and put it somewhere else. Any body know where in the UK I can get one with the right connection? Don't want to use a little bluetooth adapter if I can really help it Cheers!