Well, my brix tester doesn't work on sap, so I've no idea what I'm at. I boiled for about 4 hours yesterday, and then started boiling without taking the ash out of my arch (dumb idea), so my temps were off during the 10 hours I boiled today. Add to that the fact I forgot to adjust my float box, so was trying to boil some 4" in the arch...and all and all I was feeling pretty dumb today...;-] That said, I had 20 gallons more sap tonight than I did this morning...so I guess the trees were running all day (wasn't expecting any sap today.) 29F now and all indications it will be another good sap running day tomorrow. I decided to shut it down early tonight and get ready for a good day tomorrow...float box adjusted and I have to remove the ash in the morning, but I got a full stack of wood ready to go in early.

As an aside, I am running on low vac this year with a Guzzler and Booster Tank. I can't tell if its giving me anything more than I would get on gravity. The vacuum appears to stay low (e.g. 10") until the secondaries warm up enough to release sap, then the vac goes up (I got to 16" today). I gotta believe that any vac is better than none, but these things to be as much smoke and mirrors as fact.