Hi folks. I'm fairly new to brewing and currently trying BIAB. I did first batch and missed my starting gravity by quite a bit (1.064- target 1.054) not a bad thing per se, don't mind the extra abv. But want to be accurate. Now for the noob question...if I miss my starting gravity can I just add water to wort preboil and vise versa boil longer to hit my number once I figure out efficiency? Also what would be easiest way to figure efficiency? I've seen a couple ways on here but don't know easiest ( hate math). Thanks in advance