Unless someone is a pro feller weekend wood warriors should use the convention face cut and horizontal backcut. Pro loggers use the Humboldt face cut to maximize the use of timber but always use a horizontal backcut. A sloping backcut is probably the most dangerous thing you can do wrong. Watched a guy nearly kill himself on a vid on his phone thinking he could steer a leaner with a sloping backcut. Tree fell backwards and missed him by inches and i got to rebuild his stihl 028 saw the tree crushed.