Roger

Like the other posters said, a little back winding is nor porblem.

On masthead boats, we susally sheet the genoa in until it just about
touches the spreaders. Do you have a traveller for the main? If yes,
use it to position the boom at, or close to the center line of the boat
but don;t forget to make sure you've not stalled the sail. A couple of
tell telas at the leech will really help here.

If you don't have a traveller, adjust the sail for th ecorrect shape,
ignore the remaining back winding and have another beverage

Cheers

Matt