Chad's videos. I have been uding regular, but DAT Bootcamp uses HD?

[mcshizzler]

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I just realized the 10 week guide follows the amount of videos as the 2012 HD GC/OC have because in OC for chapter 6 there are 3 videos, but the regular 2012 OC videos there are 10 videos (but small videos). However, there are a lot less hours on the regular 2012 than the HD for the same amount of chapters. Will this make a large difference? Do I need to go purchase the HD videos now because I may miss some stuff that isn't included in the regular? The HD has spectroscopy, but the regular doesn't have that until chapter 12. Help!