i think i have come up with a way that could look better(i havent tried it because i'm too lazy) hokay,so we use ur tutorial all the way... k? then we will change the levels by pressing ctrl+l, move the center triangle to the right until the input levels RESEMBLE(i use resemble because i dont think any tutorial should be used to an exact level) thisfrom left to right)
box 1: 0.00
box 2: 0.32
box 3: 255.0
kk? were done.
i got the box statistics from [link]