The beat the song is built on is one bar, played through bars 50, 57-62 and 81, and 10 more places -- 15% of every bar the kit plays. This one moves around more than most: the beat is where to start, not the whole job.
It is played on ride, snare and kick, counted in sixteenth notes. On its own it scores 78 out of 100 -- demanding -- and the thing that decides that is how many notes a second it asks for.
The whole song is 80 out of 100, so the beat is most of what the song asks for. Get it clean and the rest follows.
A part this hard is not learned by playing it slowly and hoping. The room opens it on its simplest reduction -- the timekeeper alone, at 76 BPM -- and adds the notes back over 5 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 76, 91, 107, 122 and 138 BPM, and the gate at each one is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A one-bar groove on ride, snare and kick, in 4/4 at 138 BPM, counted in sixteenth notes. It is written out above, and it covers 15% of the bars the kit plays.
Bars 50, 57-62, 81 and 88-94, and 9 more places. The time is kept on the kick and crashes to start with, and it changes 20 times over the song.
78 out of 100 on its own -- demanding. The song as a whole is 80 out of 100. Hard, and what makes it hard is the independence between the hands and the feet.