I haven't seen much from my reds....a few gallons max. the sugars are pumping though. I may have set my collection barrels up wrong though....I just put a thread out in the tubing forum to see what the others think. I got worried on the weekend so I put in another 21 taps on a neighbours property mostly sugars.....103 taps now and only 20-30 gallons of sap in total
2014 - 6 buckets, 4 coffee cans and a propane burner - almost 40L of sap and 1.6L of syrup
2015 - 103 taps on gravity. Homemade oil tank arch and a Smoky Lake 2' X 5' hybrid. - 2.66 gallons of syrup
2016 - 101 taps, 550 gallons of sap, ~10 gallons of syrup all dark.
2017 - 138 taps, 225 gallons of sap, 5.55 gallons of dark syrup, still procrastinating on the vac.
2018 - ~150 taps, I lost track of the sap it was incredible!, over 20 gal of syrup, all dark.