When bottling does it matter how far up the neck you fill the bottle(halfway/top/bottom of neck)? Does it have any effect on carbonation or lack there of? I just finished bottling my first batch of gluten free beer (rice syrups, buckwheat/quinoa I malted myself, hops) and tried a little of as I was bottling. The good news is it tasted great, the bad news was i had already started bottling when the thought popped into my head that I did not know whether fill level mattered.