I'm a 3rd generation logger, i do hand cutting and mechanized. You are right on about small stuff, if you cut a big tree like that it's called a barber chair and it will kill you. As far as bore cutting and open face notch, i do it all the time for directional felling large and small trees, but until you get used to it watch out. I would never slash trees like that, i would simply harvest them in the winter, let the deer eat the tops, then they can eat the sprouts that grow back from a neat low cut stump, over the next several years. Plus you get the money from the stumpage, and will have an even growth forest coming back that will be harvestable again. Our deer camp drives my old clear-cut jobs and they have plenty of cover/food in that brush.