CCA Manual v. NFHS

[BigGref]

I am in my 4th year of HS Varsity officiating and am trying to get into a local D3 conference next year (07) and I Also am bringing my dad into football officiating this year and want to get a book about mechanics. I have a basketball one from Referee magazine and really enjoyed it and I was wondering for those college guys out there is if there is a lot of difference in the 5man crew for CCA and NFHS? In other words do you think it would be beneficial to get the CCA and would I recieve any flack from others if my crew started using "different" mechanics? Thanks!