The beat the song is built on is one bar, played through bars 36-39, 44-46 and 84-87, and 6 more places -- 21.2% 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, snare and kick, counted in thirty-second notes. On its own it scores 64 out of 100 -- a step up -- and the thing that decides that is how many notes a second it asks for.
The whole song is 68 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 59 BPM -- and adds the notes back over 4 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 59, 69, 80 and 90 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, snare and kick, in 3/4 at 90 BPM, counted in thirty-second notes. It is written out above, and it covers 21.2% of the bars the kit plays.
Bars 36-39, 44-46, 84-87 and 92-94, and 5 more places. The time is kept on the silence to start with, and it changes 18 times over the song.
64 out of 100 on its own -- a step up. The song as a whole is 68 out of 100: demanding, mostly on how much of it falls off the beat.