The beat the song is built on is one bar, played through bars 41, 48 and 50-62, and 6 more places -- 21.3% 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 hi-hat, snare and kick, counted in sixteenth notes. On its own it scores 60 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 67 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 136 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 136, 160, 185 and 209 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 hi-hat, snare and kick, in 4/4 at 209 BPM, counted in sixteenth notes. It is written out above, and it covers 21.3% of the bars the kit plays.
Bars 41, 48, 50-62 and 66-72, and 5 more places. The time is kept on the silence to start with, and it changes 22 times over the song.
60 out of 100 on its own -- a step up. The song as a whole is 67 out of 100: demanding, mostly on how many notes a second it asks for.