The beat the song is built on is one bar, played through bars 25-31, 58-65 and 92, and 2 more places -- 21.5% 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 45 out of 100 -- a step up -- and the thing that decides that is how fine the subdivision is.
The whole song is 74 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 65 BPM -- and adds the notes back over 3 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 65, 76 and 87 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 4/4 at 87 BPM, counted in thirty-second notes. It is written out above, and it covers 21.5% of the bars the kit plays.
Bars 25-31, 58-65, 92 and 94, and 1 more place. The time is kept on the silence to start with, and it changes 10 times over the song.
45 out of 100 on its own -- a step up. The song as a whole is 74 out of 100: demanding, mostly on how much of it falls off the beat.