Are the dark spots the result of the previous tap holes?
2014 Year 1, 1 large front yard shade tree with 3 taps - 3 quarts of the best syrup I ever had.
2015 - Convince In-laws and Neighbors, bought F-150 and bricks. 20 taps, 4 gallons in pretty bottles.
2016 -- More friends and neighbors, should add another 20 +, built temporary shelter as sugar shack. F150 traded for Ram 2500. Big Blue new barrels for 116 gal storage. 8 gallons Syrup.
2017 - Mortared Brick Arch with serving pans, no make that an 18 x 48 CDL divided flat pan, 48 taps.