Howdy,
banged on about this before but with a heap of new members worth a re mention. If you have some time might pay to put down a couple of jars of port, sherry soaked timbers. takes a fair few months, will need a change of liquor at about the 2 month mark as it gets highly oaked.
Real nice for sub batches for blending to add complexity to your whiskey, scotches, rums even.
Couple hours and 150 sticks later...