Ok, so I racked to secondaries today and I'm wondering what you guys all consider a safe amount of headspace. I filled up 5 64oz. growlers, but these growlers already have a little headspace above the 64oz. mark, plus with the must lost due to racking and hydrometer samples, I ended up with about 2" of headspace in each growler (mostly neck, but coming out a little bit to the flared part of the bottle). Is this too much?