Wow, that's actually pretty weird about the OSS thing, lol. Everyone always says that type of stuff isn't supposed to be able to happen (albeit normally they talk about it in the sense of quality not being able to drop at all, rather than in the sense of quality increasing, but still, def pretty interesting if it did that). I wonder if the target model was somehow malfunctioning with like flipped bits in the main weights (which can go unnoticed since flipped bits don't necessarily overtly destroy a model unless they happen in certain portions of the model. In main weights the model can still seem to work more or less like normal, potentially) and it somehow "repaired" it a little or something weird like that, or if it was an actual genuine improvement without any malfunction-correction or anything.