Anything you can show me Will not prove me anything. I am a believer of multiverse. Every choice you make an alternative version split off from the other choices. Look at roll of film and If one part of the film got edited, the rest of the film will need to be edited
How do you manipulate the technology to do it? Lamdo answers, you can go to world lines, but this is risky. The technolgie's just in.
Keep in mind that forums such as paranormalis that deal in experimental and exotic technologies such as time-travel, free-energy, and alternative medicine are likely being covertly monitored by the CIA, NSA and the U.S. Patent Office. Anyone smart enough to actually invent a real method of time-travel that works 100% of the time, would be extremely stupid to admit it in a forum like this one, much less to even post working schematics to the forum. Doing so would make him or her an immediate target for investigation, arrest, and/or assassination, or what in covert circles, is now referred to as termination with extreme prejudice. These actions are of course, justified in the name of "national security," which is merely a false label for what is really "corporate security." The best that those in the know, who want to make these technologies available to the public at large can do, is to post a few clues and hints, here and there, and perhaps incomplete schematics, so as to help others, but not give themselves away in the process.
My university teacher was almost kidnapped by a mad man who insisted that his invention would work, even though he had no education to make it happen himself. There would be many receptionists and guards between the crowd of amateur inventors and people with resources. Before pitching to investors or applying for a patent, make it work.
What if the schematic was posted before musk rose to where he is now, did you consider this?