We got a new to us dog last night and the start of the dog run we have is one of my silver maples. I had 4 taps on this tree for bags (tree is 5 foot in diameter) so I had to remove them for the new dog and installed drop lines to tee's and all running to a 5 gallon cube that I had left over. Tubing is wrapped tight to the tree running around the perimeter and depositing into a cube between the tree and the doghouse. I tapped this tree waaaay back in December and it had slowed a bit on bags. Now that is is on gravity it seems to have awaken and running wildly. Looking forward to going to tubing nest year even if it just gravity with no mechanical vacuum.