There is about 20mm (10mm fore and aft each) of fine adjustment with the screw at the back of the heel piece. The lowest one, the upper is for DIN adjustment. If you need more, you can remove the AFD by inserting a blade type screwdriver on the right side of the AFD an gently twist, releasing the clip and then sliding the AFD rearward. Remember how you slid it off, since replacement is the opposite without the screwdriver stage, the AFD just clicks back. Once yhe AFD is off you will see the band and the clips that hold is down. Use a 1/4" bladed screwdriver and rotate the two clips 180 degrees. The band then can be popped out and slid to the approximate boot sole length in 10mm increments. Set the band so that the number which is closest to your boot sole is visible or partially caovered (I can't remember the exact way that binding is). Tighten the band clips as opposite to how you opened them. Slip the AFD back and it should click in if done properly. Use the forward pressure screw at the bottom of the back of the heel to fine tune. Forward pressue is correct when the heel housing back face is flush with the forward pressure screw. Remove the boot when adjusting the forward pressure, and click in to see if you have the correct setting. Click in, look, click out, adjust, click in, look, click out, adjust, etc.