See, I think I have a mental technical inability. I looked at those, and thought, great, that's really helpful. Then I looked again, and I started to wonder why, in the first pic, the pulley at H has an arrow saying right/tight that is pointing left.

And in the second pic, why are arrows 1 and 2 pointing at the top of the top pulley in the 'top adj screw' pic, and at the bottom of it in the other one. And why is the bottom pulley the guide pulley in the top adj screw pic, and why is the top pulley the guide pulley in the bottom pic.
