Ok, back to this as I just put my cubes in bourbon in a mason jar in preparation for the current kegs emptying so I can carb this beauty. It says add the oak and the bourbon directly to the keg, Since I am planning to bottle this off the tap once it's carbed, I don't have any concern about letting the oak sit in the keg too long. Advice on how long to soak the oak cubes before adding to the keg? A week? A couple days?