i was tired of my keyboard moving. i routed a 1/2" notch out of a 1" dowel cut to 2" length, i butted this against the keyboard with the cord sitting in the notch. i double side taped the dowel to the tray. did this months ago. has not budged a mm. i figured i'd mention this since others might find this simple item of interest. of course this only really works if your keyboard has the cord in the middle. the cord not resting in the dowel would stop front to back movement but not side to side.