My buddy's dad said he had never been stuck in the snow. Then I walked in the kitchen and his mom whispered, "If it snows, he calls out from work ,and doesn't get off the couch till it quits snowing." Maybe it's the same theory? If you have a big tree leaning 45* in the wrong direction, with a full canopy, no amount of wedges and a perfect notch will over come gravity and pick that tree up. Even if you have a 4" hinge, the hinge will fail and the tree will go in the direction of the lean. A pull line high up can pull it over, maybe. But, not just notches and wedges. I'm not a PNW'er either. I'm a Mid Atlantic native, 4th generation tree care, licensed MD tree expert, retired. In the past 40 years I have seen 2 or 3 contractors put a big track loader down hill on a big leaning tree thinking they could push it over, and the notch and hinge failed and the tree pivoted on the bucket and fell back over the machine. luckly no one was ever hurt, Joe.