This is in case we can't manipulate our way into keeping those 8 frames. I did a lazy-sync in mid-stage and the movie goes clear out to where it ends.
Still, the original route with the better item drops has a lag frame in it, and this version, while it loses us 8 frames and compels us to match said item drops in the later half, removes a lag frame the other item drops were stuck with.
Oh, and I did some input clean-up in the rest of the movie. Nothing that affects sync, just marking out frame rules properly and all that.
P.S. The Stage 4 boss almost certainly will not let us avoid all damage. We are rather lacking in ammo, and need at least 5 hits of 8 damage from our spikeballs. The remaining 15 HP can be taken down in 6 hits of 4, 3, 2, 2, 2, and 2, in case you want to remove one Charge Storage, and we have exactly the ammo necessary for that.