Hi all I own a Myford Super 7 Lathe, Had it a few years now but only use it occasionally.My Question I have always kept the toolpost on the crossslide set at the zero degrease marks unless I need to cut a small taper on workpiece,However when I look at utube videos of people using lathes there toolpost seems to be set about 30 to 40 degrease angle on the crossslide why is this ?