I took a look again at the video of Mander's RR with April
First moment of shroom going into lap 2:

Notice how aggressive his line is; he nearly falls off or hits the bricks. Misses by pixels at most:

He hops here, while simultaneously starting to straighten up a little:

Straightened up into a line heading right for the bumper. This is all happening in a very short amount of time:

Starts turning to the right again:

In a very few frames before hitting the bumper, he seems practically in the same plane as it:

I submit these screenshots as evidence of potential TAS savestate usage on his RR 3-lap. The line is aggressive as you can see; he nearly falls off to the right before reaching the hop. The shroom is used before the effects of the boosters wear off. The hop itself is far back on the road, and it even appears that he straightens up immediately after hopping before turning to the right again a couple frames later. In my view, that's a likely savestate used right at the hop.
I also stick to the argument that he is a known cheater who is good at covering his tracks. His times cannot be trusted as legitimate on this site, and that's what matters most.
Submitted as my $.02, April.