On step #40 .
Yes there are three red and three orange as you have noted. But one of the reds is fine and one of the orange is course
at least on my A1145.
As you remove the screws during these steps, place them on a towel or a piece of cardboard. With a Sharpie label a piece of masking tape with the step number from which they were taken from. Then place the removed screws under the tape.
This ongoing step will aid in you having control on your reassembly without searching for and identifying the size and length all the screws that you are about to remove.