Point taken Wayne but my thought was to keep luff length while reducing overall sail area. Easing a tall, narrower main dramatically reduces drive over a lower aspect sail eased the same amount. Also no messing around with reefs.

Pete, you could carry a correctly cut hooter to weather in lower wind speeds (guessing at sub 8kts) and that would make up for the lost sail area from the main on those lighter days. Dropping the whole lot onto the tramp when it's breezy would reduce the windage and keep the performance when una rigged.