Following on from my post two days ago I can now happily say that the story for ncis_ficathon is now pretty much finished! I haven't gone through it to edit it yet or had it beta'd, but as pretty much what I write is what I end up with that task is not an onerous one.
My guesstimate was a little out, having said probably between 3,000 - 5,000 words, it has ended up at c.8,000 words, which means I wrote c.7,500 words in two afternoons (about five/six hours in total) which I'm pretty pleased with.