The beat the song is built on is one bar, played through bars 105-117 and 119-130 -- 21% 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 crash, hi-hat, snare and kick, counted in thirty-second notes. On its own it scores 73 out of 100 -- demanding -- and the thing that decides that is how many notes a second it asks for.
The whole song is 79 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 44 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 44, 53, 62, 71 and 80 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 crash, hi-hat, snare and kick, in 4/4 at 80 BPM, counted in thirty-second notes. It is written out above, and it covers 21% of the bars the kit plays.
Bars 105-117 and 119-130. The time is kept on the silence to start with, and it changes 14 times over the song.
73 out of 100 on its own -- demanding. The song as a whole is 79 out of 100: demanding, mostly on how much of it falls off the beat.