Just losen the center screw (As I meember on the device bindigs, the screw does not come out completely)and move the toe & heel so thet the numbers corresponding to you bootsole length show in both windows . Round down to the nearest 5 mm. In other words if your boot sole length is 313, you set the numbers showing to 31 in the 2 windows. If you are a 310 you also set it to 31. then put the boot in the binding. If you are a 315 you set it between to the mark between 31 & 32 in both windows.
Check the bottom screw in the heel piece. when your forward pressure is correct, it is flush with the housing. DO NOT ADJUST THE FORWARD PRESSURE WITH THE BOOT IN THE BINDING!. YOU WILL STRIP THE HEEL ADJUSTMENT CAM. If the screw is not flush, remove the boot and loosen or tighten as needed. Insert boot and check. Once you have tit set flush, remove boot and turn screw in 1-2 clicks. Your done.
You also must adjust the height of the toepiece. You must have a .5mm gap between the AFD and your bootsole. You can use a Driver's license or maybe a credit card if you have no other .5mm stock.