I spent 20mins trying to get my planes to work.....it seems I have more issues than this.....

The only thing I can think of is that your pics are not the same size....therefore your ratios will be off....

face_front = 528x699
face_side = 571x698

And if the author did this and it worked for him/her...then they should explain what they did.....nothing frustrates me more than when tutorials are done and there is one small thing that the artist does to get the result, and he/she does not tell us about it.

Sorry I couldn't be of more help......