So I'm trying to finish a content-complete first draft of how to assemble a sub-assembly of the new 3d printed re-spin of my little CNC project. It's not nearly as awful a slog as was the laser-cut version,but it's still burning a big pile of attention.

Describing my procedure changes the cost metric from hard-to-do to hard-to-describe. Not surprisingly, and not complainingly because this is a good thing, that leads to epiphanies about how to make the process less hard to describe (and incidentally less hard to do). 

And now I've just recognized a way to re-sequence assembly that will eliminate a small wrinkle of doing that turns into lots of description.

Do I burn time generating new material to finish this draft to get on with sooner discarding that new material?

or

Do I burn time trying to "patch" material I've already generated to simplify generating the remainder? 

Also minor design fixes emerge, generating awkward text asides about what will differ from photos -- or new photos - or new prints for new photos, but that's chronic conundrum vs. acute conundrum.