So, that Sizwill never engaged Dan... which is a good thing... meaning that the tapered hinge you done was plenty enough to hold all the side lean that that tree was ever gonna have. But also, (and you must believe me brother, that it pains me to say this) from the look of the image, (and God knows I can't see it too sweet) it looks like you COULD have a bit of a nasty dutchman just before the vertical boring cut. One can plainly see this (now that I think about it) from the open (black colored) kerf on the tension side. (Or... were you trying for a double/tripple hinge type deal?)
I would always advide against it when using a Sizwill. (But then... I am definitely no fan AT ALL of the double/trippel hinge even though Jack Beelar and Stig both use them. Two men whose walking ground, I would gladly worship.)
Burnham: But now we're just beating a dead horse. It has already been adequately and thoroughly demonstrated (okay... mostly by myself, but others HAVE weighed in) that I have been 100% certified to be very much dumber indeed than a box of rocks, so... Can I ask why you repeat that redundancy?