100 days may be overkill in a barrel that size. You have a lot more oak surface area per gallon than a full sized whiskey barrel, I have read at least a 3x (someone said 20?? not sure about that) increase in "oak aging" compared to a standard barrel, but I'm no mathematician or scientist. I put clear spirits in for one month and they were transformed into whiskey colored smooth tasty woody sweetness. I think Balcones used roughly one month as well. 2 weeks made an impact on my barleywine.