I would like you to talk about tempo change in songs. What is the concept, how it works? Is there any particular rule how it works? For instance, Dream Theater The Mirror 172 BPM after 82 BPM and back 172 BPM. While the rhythm guitar keeps the same tempo. I just cannot grasp it. Is there any connection between these tempos?
In your songs, Overflow 45, 105, 140 BPM. Liquid Time, 130, 170, 130 BPM.