So, as i mentioned in my previous post about the fermentor lid blowing off twice, I am brewing the Blood Orange Hefe from the Extreme Brewing Book. I believe my friend and I followed the recipe as close as possible but we found our OG coming in at about 1.042. We bottled this past Wed and found that the ABV will be somewhere at about 3.9%. i believe it was supposed to be about 4.5-5%. this was an all extract recipe . We were just wondering what type of factors could lead to this happening, as we would not like to have the same mistake twice.