What exactly do you think wood happen if you tried to prototype SBURB disk, after alchemising one in the future and going back in time?
Do you need to keep the disc in the tray to keep SBURB open? Maybe you can just pull it out and toss it into the Sprite once you’re connected, with no need for Time Shenanigans. If the Kernelsprite even allows this, it may get weird or even glitchy… Alternatively, it just takes the overall shape of the CD and does nothing else. Remember the discs are the code to link with the Session, rather than actually SBURB itself.