I haven't mentioned the removal of the two sets of connecting rods. Here they are on a chassis which needs to be 'attended to'. Unlike the very tiny screws on the A1 and A4 locos, the devices which hold the conrol to the wheels are a simple push fit. While you are looking at the picture, note that the copper contacts for the fron two wheels are not actually touching the wheel. This may make for some erratic running over points.