Well, I had collected 240gal of sap up to 3:00pm yesterday when I finally got my vacuum working again. For 3 days I walked the lines checking for leaky taps...when low and behold the problem was at a pressure tank right next to the pump. Took one of the ends off and greased the O-ring, and voila, there's the vacuum...so with that fixed, I started my first boil of the season. Looks to me like its going to be a good season.