The beat the song is built on is one bar, played through bars 2-9, 12-19 and 38-45, and 2 more places -- 29.3% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on hi-hat, snare and kick, counted in thirty-second notes. On its own it scores 54 out of 100 -- a step up -- and the thing that decides that is how fine the subdivision is.
The whole song is 70 out of 100, so the beat is not the hard part: what costs you is everything around it, the joins and the fills.
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 62 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 62, 74, 85 and 96 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 96 BPM, counted in thirty-second notes. It is written out above, and it covers 29.3% of the bars the kit plays.
Bars 2-9, 12-19, 38-45 and 48-55, and 1 more place. The time is kept on the snare to start with, and it changes 8 times over the song.
54 out of 100 on its own -- a step up. The song as a whole is 70 out of 100: demanding, mostly on how fine the subdivision is.