Horrible video. As I mentioned before, not all rocker studs are the same length. If you pay no attention to whether you have the correct length of rocker stud for your application then nothing else said in that video matters. Rocker arms touch in 3 places making all 3 of those areas of the rocker arm assembly important. At the 3:40 second mark he breezes by the rocker stud and doesn't mention that GOD did not make one rocker stud fits all. I agree with most of what he says and certainly I am still learning but that little detail could make countless people chasing adjustment that will never come because they have the wrong stud for their application. If they only made one length stud then the video would be great but clearly 1 factor can change whether its going to work right or not. That video should be redone and he should add the part about different length rocker studs so people trying to learn this and do this on their own will know there is another factor in this process that is not mentioned in the video I just watched. Anyone care to guess how many different lengths of rocker studs every company has? Quick tip, its more than one length.