The Goldilocks Touch – Overdriving Spouts Reduces Sap Yield. The Maple News 18(9): 1, 29. By Perkins, T.D., Bosley, W.T., and van den Berg, A.K. By Web MasterMarch 1, 2025Other Publications The Goldilocks Touch – Overdriving Spouts Reduces Sap Yield. The Maple News 18(9): 1, 29. By Perkins, T.D., Bosley, W.T., and van den Berg, A.K.