undiscovered start trick ????

Unbelievable as it is, I have just discovered an even faster way to do the start-booster trick that I discovered using methods that I won't yet disclose. It is totally unclear why or how this works. I know it looks simple, but I also know with certainty, that you will never do it if you try: it is not RTA-viable.

I am running a competition for this. All you have to do is get 4.38 on this map
(you can easily recreate this map by yourself, just make sure it goes in the negative X direction):
https://www.sendspace.com/file/ke6xm7

The first person to do it will get 2000cc.
You can use whatever method you want, bruteforcing, precision scripts, try and copy how it looks from this video, whatever. Just no cheating obviously.
There are no tricks, there is no catch. All you have to do is get 4.38.
The run I got was 4.383, so it should be very easy. Good luck.

The competition will end in 7 days, and then I will release the inputs so you can use it in your TASes if you want. Luckily enough, the A04 start goes in the negative X direction, so it should be possible to save another -0.01 there. Something to do in the future...

EDIT (4/2): the competition has been won! Lambda managed (somehow) to replicate this bug and also got a time of 4.383. Does this mean its technically RTA-viable??

Here are the inputs
https://pastebin.com/vv0esqzq

JaV