Originally Posted by
Super Sapper
As you get closer to syrup the density changes quicker as you need to remove less water for each percentage point. You also have a larger volume of sweet or almost syrup evaporating at a higher rate than you would in a syrup pan. If you start making syrup in the middle of the flue pan as does happen with a syrup pan or just get a little distracted it can go down hill faster and would take a lot larger OH CRAP pail to keep from burning the pan. Just remember that when you start up the next boil you will have one very large draw at the beginning and it would be very hard to add fresh sap to push it out before burning.