The aging process begins with the distillation of the rum in two different types of stills: the Wedderburn stills and the Plummer stills. The heavy rum distilled in the Wedderburn stills is then aged for a period of 6 years in oak barrels. This extended aging allows the rum to develop deeper and more complex flavors, as well as mellow out any harsh edges that may be present in the raw spirit.
On the other hand, the lighter rum distilled in the Plummer stills undergoes a shorter aging period of between 18 months and 3 years. This relatively shorter aging time allows the rum to retain more of its vibrant and fruity characteristics, adding a layer of brightness and freshness to the final blend.