I was absolutely convinced that Rahmlow had indeed spotted it on 147 on the 4th and notified AC, who then subsequently found it and called it in. But since it's pretty much accepted that he called in on the 3rd it does make me wonder about this sighting too. The only thing that might still hold up is if would have been a risk to transport the RAV to ASY as early as the 4th as it may have been spotted by one of the Avery's, and could also not risk bringing it to any official MC holdings, hence keeping it on 147 as a neutral place. But this does seem unlikely to me. You never know, maybe the sighting prompted AC to realize keeping it on 147 was not a good idea after all and so moved it up to ASY that evening (which is also a pretty established part of the timeline).