Question on C.W. Post style 4-2-5 (4-4)

"where is the weakside OLB aligned? how does he defend the weakside iso? its seems that his ILB are aligned alot like a 43 look. "

C.W. Post has the weak OLB line up in the apex between the SE and EMOLOS at about 4 yards deep. (I'm not positive about the depth. He is not responsible for the B gap Iso. That belongs to the ILB. (10 tech) The OLB's rule concerning off-tackle plays is that he is not to go inside until the ball has committed to the hole. He has a "5 yard fence". That means that he has to go around an imaginary fence that starts at the EMOLOS and extends 5 yards downfield. By doing that he has time to make sure that the ball doesn't bounce outside.

Now if there is an Iso coming directly at him the OLB attacks the FB head on. He can be as deep as 3 yards. (C.W. Post rule) This is because they often in their robber package where the FS will fill the alley and play off of the OLBs angle. If the OLB comes hard to the FB and the ball bounces outside the FS will widen. If the OLB plays soft and takes on the FB late or is kicked out the FS inside of him in the alley. They encourage the OLB to be aggressive to force the issue.