I don't understand why you have steps 11-17. In step 10, you can clearly see the board with the screw that needs adjusting. Taking apart the rest of the GameCube is utterly unnecessary. After following the guide in full, I thought, 'Why did I just dismantle all that other stuff when I didn't even NEED to?'

Once the assembly is removed from the metal covering the board, it is a simple matter to turn the screw to increase the laser strength. I did this after my initial adjustment didn't work. I ignored steps 11-17 and everything works perfectly now. My old games which simply would not load, now do. Thanks for the advice leading up to step 10 though. That part was helpful.