Grace Under Pressure

I'm desperately trying to find a fic that's a take on the ep Grace Under Pressure, only instead of Sam it's John that Rodney hallucinates. The twist is that John is really there via an Ancient device and Rodney doesn't know that until afterwards.

I've checked various tags and things on AO3 but I just can't find it. Help, Storfinders! You're my only hope!