I love "discovery learning"!
Only apply enough tension on the leech line to stop the flutter MW. If that results in significant cupping of the leech then the cloth is tired and if your concern is speed, (like Giu) then a trip to the loft is in order. Start saving now!
As long as you are happy just out kicking around on the pond you can sail with that situation for a very long time. Which lake in GA?