Hi,
You can use the extra 80p move in both your bound and the enemy bound. It doesn't specify when, so you can do it at anytime.
Note you can only use the extra movement to "line up". This is important as you can't use the extra move to contact enemy that you are not already in contact with.
Now as for your example, I can't be certain, as it depends if you can line up ONLY with a wheel/pivot and sideways shift, and the distance any element moves is 80p or less.
If so, sure, you can do it. But I'm thinking the rear element is going to have to swing around far more than 80p.
Hope this helps,
G^is,
JohnG