Star Trek Fic Finder

I recently read a crossover fic between Trek and the Firefly/Serenity 'verse. I don't remember a lot of details, just that there were scenes where the people with similar jobs on each ship (Kaylee and Scotty, the engineers; Mal and Jim, the captains, etc.) interacted. I think it was posted in the last week or two and I'm guessing it was probably either on st_reboot or kirk_mccoy, since those are the two main Star Trek related places I frequent on LJ.

And yeah, that's all I got. I know it's vague, and probably not very helpful, but I don't really remember anything else about it. It was late when I read it and I wanted to go back and re-read it when I was actually awake, but I forgot to bookmark it.