Mr 557
It helps to undo one at a time. I loosen the first one, 3 fastened, and then push a screwdriver just wider than the gap between the devices.at the top corner. Push down sufficiently hard and the end device will just move. Then the next in line. Once you get to the fourth, put a screw back in 3rd device to hold lateral movement, and make fourth one move. Simple. But as one said here, you need to get the hang of it, or whatever you call in in USA English Americanish or broke.
Best of luck! Tell us how it goes.
D.
Last edited by ANet; 2020-06-12 23:30.