Think I have about sixty miles of gasoline left in my car

Research for the next group of scenes has been accomplished, and that should be the biggest part of the research overall, save for some inevitable smidges along the way. (Knock wood.) I have begun writing the next scene and am probably about halfway through it. But I stopped because there are a couple of fiddly details that are not sitting right with me. The right characters are in the scene. They are behaving as they should be (mostly) and the necessary relationships and setting details are being revealed. But these little fiddly details are bugging me. I think I have decided to push ahead and finish the scene anyhow, with the resolve to mull over what needs to change about the little fiddly details--because I know at this point that they need to be different, but I do not yet know what they need to be instead of what they currently are.

I also need to tweak the behavior of one of the characters, because I am not quite capturing who he is. And I do need to nail that before I go on, or I will be floundering in every scene after this one.

Any writing is good, as long as it's taking me somewhere. Right?