While I was working on the music, Spike was editing the trailer. This needed to be done in order for me to finish the music, as it needed to go with the movement and cuts in the trailer.
I put the first edit of the trailer onto my USB, in order to fit the music to it:

Using this edit, I completed the timing and beats of the music, by playing the trailer and music aside one another. This is the final edit of the music: