Kink meme help?

[stainless]

I KNOW there was a prompt on the kinkmeme a while back about TFP Megatron giving Optimus a recording of exactly what they got up to when Optimus was on the Nemesis as Orion with no memory. I've written a fic inspired by it, but I cannot find the prompt. I've used the Delicious searcher/index thing and cannot find it. Anyone know where it might be?