Interestingly, a good deal of maple research USED to be done by the U.S. Forest Service out of the "Philadelphia Lab." Wonder how people felt about that? It is certainly a valid point. Most people would prefer to have the studies done in a spot exactly like they have, but the research stations had to be set up somewhere. Wasn't my call (in 1946) where the University of Vermont decided to put a maple research station.
Wounds were typically double OR MORE the volume with any of the rejuvenation practices. The paper is "in press" as we speak...and will be out in the next Maple Syrup Digest (so we're told), and yes, there will be pictures.For not being a recommend practice, those results would be hard for me to ignore especially if the wound was less than 1/3 larger than a standard 1 3/4" deep tap hole.