As a matter of fact I do:
Four strong, three week, two sour and one sweet.
Four parts rum, recommend Mount Gay
Three parts water
Two parts Roses Lime Juice
One part brown sugar.
Stir all until fully mixed, serve over ice with a touch of fresh grated nutmeg on top.
RT
I'm copying this recipe (with permission) from the Cruising & Racing forum "Where Do You Keep Your Boat" thread