Tonight will be our last boil. it's taking roughly 65 gallons of sap to make a gallon of syrup... Sap is still crystal clear, but weak! my syrup is tasting great, however we started noticing a little different flavor in it towards the end of last night. we'll be around 1/2 a crop when all is said and done. so, not a total loss, but surely the worse we've had it since we started.