The only thing I have to add to your post, 'peen, is that those "zones" should be smaller the earlier you go in the draft.
Picking at 4, your zone is way smaller vs picking at 22, and even more so in later rounds.
Top 5 picks should be slam dunks, no reaching at all.
![[Linked Image]](http://www.dawgtalkers.net/uploads/small-gator-chomp.gif)