I do the first 3 the other way round..So clip modules in to frame, terminate, screw frame to back box, screw face plate to frame.
strip the cores, terminate the earths into the frame, screw the frame onto the box, terminate the cores into the switches ( pull cables through the frame holes ) , clip the switches into the frame ( since they mount from the front.. ) and then screw the faceplate on..
this way you are certain that you haven't trapped or pinched the cables with the frame screws..