And as we come into the final straight - still slightly off the pace, but getting second wind, the writing becomes more reckless as I throw myself towards the line.
Far too late to make it all fit together, ideas tumble out that may have to go get retro-fitted to all that went before.
That edit, that series of edits, happens once I have all the words in the can. The editing suite is a whole other life for a director than the shooting process, of trying to capture stuff on film.
If I had the control-freak approach of having an outline, plot and characters story-boarded, then the edit just tidies up what was visualized initially, and what finally ended up as the raw material.
During the edit we might find we need to re-shoot some stuff, even recall the cast and shoot some newly-scripted bits, but finally we have to compile what we have, and then try it out on someone.
I really don't want this run by a test group in some little suburban cinema in middle America.
I need a crowd who knows its a rough draft, a stab in the dark, just one more attempt to created something which might actually change the way we see things, do things. Over-ambitious, no doubt, and falling far short at this stage, but we can't let that inner critic out just yet (even if we secretly feel that we agree).
The critic, after all, is cruising along in one of the support vehicles, making some sort of documentary about the creative process, while I still slog on - nowhere near as tired as Eddie Izzard on his 40th marathon...
But he remains a role-model of gritted-teeth determination to complete something that he made a commitment to himself to conclude. My ambitions remain far below that kind of target, fairly achievable, after all, but also without a support team. All I have going for me is a swarm of other crazy folk, all over the planet, writing their hearts out to hit that target.
Be lucky, folks, the end is in sight. Why quit now? The time to quit came in the early stages, or maybe halfway, when you could retire having made a serious attempt. Now it would just feel sad to get so close to the line and not make it. Let's just finish this, OK, and I'll see you in the bar in four days, or so (given the time differences around the world).
Go for it! One last push!