One of the things Balvenie likes to do in its standard offerings besides various age statements is experiment with different cask finishes. Unlike other whiskys, who often use a cask finish for their NAS releases, Balvenie displays both age and finish. Unlike some distillers, who buy their ex-wine or spirit barrels from around the world, Balvenie takes American oak casks and chooses the West Indian rums (i.e. Cuba, but renamed to get past picky U.S. import law) that fill them. The master distiller chooses when these barrels are ready to empty and be filled with the 14 year old whisky for finishing. How does the smoothness of the base whisky mix with the rum casks?