I have.
1 - your motive, agenda, is to disbelieve. Holocaust revisionism is really Holocaust denial. The mass murders did not happen and do not worry that the only alternative, which is millions of Jews still alive, somewhere, in 1944, is not evidenced. Do not worry that millions of people still alive would leave a lot of evidence. Instead, find reasons to deny that gassings, mass graves and cremations took place by finding them too incredible to have happened. Find mistakes and contradictions and make out they are lies of the people who are part of the hoax. Blame the Jews and the Soviets, they cannot be trusted.
2 - you lack experience and training in history and criminal investigations. That causes you to make a lot of mistakes, such as thinking witnesses and intelligence reports should be more accurate than they are. You cherry-pick evidence, which is not verified by corroboration, so you end up failing at the very basic task of any investigator, establishing what happened. You think that being asked to prove no gassings took place inside the Kremas is somehow reversing the burden of proof and that it is impossible to prove a negative. But, I know what to do, as would any historian or criminal investigator.
3 - you lack logical thinking skills. Clearly, there is a very heavy reliance on the illogical argument that because you cannot work out how the gas chambers, mass graves and cremations could have functioned, therefore they did not exist. You ignore that the Nazis destroyed as much evidence as they could, so we do not have accurate details about the chambers, pits and ovens. It is not possible to work out the details, when the details do not exist. Your speculations, which get dressed up as scientific analysis, are flawed, because they rely too much on estimations and there are too many knowledge gaps. You cannot argue history or crime, you have to be able to evidence it.
Hence, when confronted with the Vrba report, you home in on a mistake, as if that somehow discredits the entire report and reveals it to be a fiction. Trollies on rails becomes a roller coaster, as you want the narrative to be so ridiculous as to be unbelievable.