New to the forum -- this is my first post. This year we're scaling up from 25 taps to 99 taps. A friend has access to 55 gallon bourbon barrels. We're very interested in barrel-aging some or even most of our syrup, but have some questions. 1. Do the barrels have to be completely filled, or is there a way we could we half-fill a barrel for aging? 2. How long should I plan to age the syrup in a 55 gallon barrel? Thanks in advance for your knowledge.